r/3Dprinting • u/Blackdragon1400 • 15h ago
Discussion Stop using razor blades - use plastic instead
Back in the day, paint scrapers and razor blades were the perfect go-to for removing stuck prints from the build plate.
These plastic razor blades work just as well (if not better because you can be more rough with them) and cost a whopping $5 on amazon.
These work much MUCH better than 3D printed scrapers too, and are significantly safer to use than paint scrapers (for both your body and your build plate).
Edit: I never thought the use of scrapers was such a divisive topic but here we are lmao. Some folks have rather strong opinions in the comments.
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u/interflop 15h ago
I've been using these since I got my first printer. We use them at work to scrape stickers off devices without scratching them.
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u/CautionarySnail 14h ago
Admittedly the first time I saw these, I didnāt understand the utility. It seemed like a dumb product. But Iāve come around on these in a big way; their specific use case is pretty common.
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u/Cheap-Chapter-5920 10h ago
Once you have them handy, they become useful for all sorts of things. I probably use them to remove labels or tape more than anything, but also found they are perfect to remove dripped hot glue from a hardwood floor.
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u/CustodialSamurai Centauri Carbon, Neptune 4 Pro, Ender 3 Pro 8h ago
Custodian here. Absolute game changer where I work. The one I keep by my printer at home is the double ended variant that has a plastic blade on one end and a metal blade on the other. Rarely use the metal blade but it's nice to have.
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u/Rbagg_ 15h ago
I like these, having a metal one on hand is helpful for when things get really stuck to the build plate
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u/victrin 15h ago
I like the one I have. It has metal on one side and plastic on the other. So if the plastic isnāt working you just cap it and flip it.
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u/OsmeOxys "(Sp)ender 3" 14h ago
just
cap it andflip it.Oooooh, a new way to give my lazy hands another scar. I'm in.
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u/issue9mm 15h ago
When things are super stuck, I've found that I'm a lot more precise using my pocket knife, as flat to the bed as possible
Scrapers aren't in my muscle memory so they're always awkward to use, but a pocket knife used sort of like a pencil is much less likely to go awry
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u/Fragrant_Major_9553 14h ago
The print I found that uses razor blade has a little nub on the bottom that pits it at the exact right angle to scrape
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u/issue9mm 14h ago
Oh that's neat. I'll have to check mine. But I guess if I'm being totally honest, I haven't needed to use a scraper of any kind in quite a while
Once you figure out what materials work on which plates, and develop the patience to let your plates cool down, things just kind of work
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u/Bot1-The_Bot_Meanace 15h ago
I usually put the plate in the freezer if that happens
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u/starkiller_bass 14h ago
Do you ever take it out, or does that just make it easier to forget about it?
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u/Street-Sweeper213 15h ago
I've only used this on glass beds it works for others?
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u/Bot1-The_Bot_Meanace 15h ago
Yeah of course, most plastics contract more than spring steel. And even tough stuff like TPU will get harder due to the cold and will usually just pop off when you bend the plate slightly after freezing
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u/Few_Candidate_8036 13h ago
I just drag the plate on the carpet for a couple seconds. It cools so fast that everything pops right off
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u/Festinaut Neptune 4 Plus 15h ago
Are you using textured PEI? Does it scratch the plate? I've always heard not to use it but I've had a few that were REALLY stuck so metal might have helped.
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u/Rbagg_ 8h ago
Yes textured, and yes i have definitely scratched the plate a lot when ive been in a hurry and itās very stuck.
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u/SidTheSperm 12h ago
Just anecdotal but Iāve never had issues with a metal scraper on my textured PEI plates. Common wisdom is that youāll damage/scratch your plate, but I havenāt had any issues yet on either of my two machines
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u/YellowBreakfast It's in three dee! 15h ago
A #2 pallet knife is the best tool I've had.
One came with my SV08 and changed my game.
It's thin yet strong metal but with rounded edges so it doesn't cut the bed.
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u/GrizzlyCyborg 12h ago
Totally agree. The plastic blades are nice but to thick and the edge deforms fast.
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u/thinkscotty 5h ago
They're meant to deform fast, they're basically single use. And of course metal works better for scraping, nobody disputes that. The dispute is how long you want your build plate to last.
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u/crazedizzled 4h ago
You can easily use the metal scraper without damaging the bed. It's not that hard.
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u/thinkscotty 2h ago
You can do it without destroying the bed for sure, but what I don't think you can do is avoid scraping metal and PEI together at all. Which isn't the end of the world but is definitely a lot more likely to slowly degrade your build plate coating over time.
I'm not against using a metal scraper in all circumstances, sometimes it's just what's required, but I'd want to use plastic the majority of the time. A pack of 200 blades costs $7, and it works on 90% of prints so I just prefer it. Honestly I rarely use a scraper at all.
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u/Skelevader 12h ago
Another vote here. By far the best. Mine came in a 3D print removal kit from amazon that had another long thin blade to help remove bigger pieces, but the pallet knife is used 99% of the time and works perfect.
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u/CoIdBanana 8h ago
This is exactly what I always recommend to people. Works better than any scraper tool (metal or plastic,) doesn't scratch the build plate, removes prints super easily, and is cheap to replace should it get damaged.
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u/nhorvath 7h ago
I have an offset spatula that's really thin but sturdy. it works so well i never even remove my build plate.
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u/xondk 15h ago
I'm personally using this one, has been working great for me, just making sure the first layers of the blades are as small as possible.
https://www.printables.com/model/832209-optimized-bed-scraper-xl
And the blades are great for when I have small amounts of filaments left over.
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u/Own_Perspective4825 15h ago
The performance of printed blades is much inferior to molded ones. Also much more expensive.
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u/SimilarTop352 15h ago
anecdotal evidence, but I have put more damage on my plate with the prints itself than my knife (which I initially bought for carving and reground myself). I have been a boy scout tho,30 years with any tool should make you handy with it, eh. if you can keep the angle sharpening it by hand, you can use it on the plate
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u/notcuddly9 15h ago
I got bored one night and brought my whet stones over to watch the print and made my scraper the sharpest chisel I have ever used, it actually works great and because I never really cut anything I haven't had to sharpen it, I can still shave with it, lol
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u/DrMinkenstein 14h ago
You were a Boy Scout for 30y?! š¤ÆDid you eventually make eagle?š¤Ŗ
Sorry couldnāt help it. BS was good times tho.
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u/WI_Esox_lucius 15h ago
The metal one that came with my printer has never caused any issues but I barely ever use it.Ā Only had to recently for some PA6-CF.Ā
If it ever does maybe then I'll switch to something like this.Ā
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u/aweyeahdawg 15h ago
Yeah Iāve been using the metal scraper since I got my printer 3 years ago. On most prints. No issues.
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u/Jaalan 14h ago
I think it's important to note that the metal blades that come with a printer are normally not hardened
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u/SheriffBartholomew 7h ago
What's wrong with picking it off with my fingernail and then screaming in agony when the line of filament embeds itself under my fingernail like a bamboo torture device?
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u/d3tox1337 15h ago
Hah! I picked some of these to take some vinyl off a truck I bought.
I figured they'd live in my toolbox for ages without a use now that the job is done... guess not.
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u/Exciting_Turn_9559 15h ago edited 11h ago
Buildtak makes a spatula which was specifically designed for removing 3d prints. I've been using it for the better part of a decade. It's a wonderful tool which I think every 3d printer owner should own.
https://buildtak.com/products/buildtak-spatula
edit: To this I would add that over the years I have seen people post some pretty gnarly injuries to both their hands and their printers caused by using improvised tools like putty knives. Most of those were in the era before magnetic buildplates however.
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u/sleepybrett 15h ago
this is the single best spatula purchase i have ever made, i've been using this guy for over 10 years at this point, just brilliant.
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u/yachius 14h ago
By far the best tool, sharpening the leading edge makes it even better. I have the exact plastic blades that OP posted for completely unrelated to 3d printing purposes and they suck compared to a dedicated sharp spatula that can get completely parallel to the build plate and still have leverage.
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u/LazyLancer 15h ago
Nah, I have a scraper with both a metal and a plastic blade.
Metal is much better if you can be extremely gentle - touch the layer of plastic on the plate surface and lift it, then slowly squeeze the scraper blade underneath at an extremely shallow angle. Just donāt rub the surface with the blade. So far I havenāt had a single scratch on the plate.
Plastic blade is ok for rubbing but it dents and deforms quickly losing whatever sharpness it had if you start rubbing.
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u/BrianScalaweenie 15h ago
Yeah Iām trying to figure out how people are scraping things off if theyāre damaging their build plates. Ive done thousands of prints at this point and have always used the metal scraper that came with my printer. I have not once damaged the plate (or hurt myself).
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u/Saradoesntsleep 13h ago
I use one of the sharp scrapers for cleaning induction stoves. Usually I use my printed one, but sometimes I need that thing. I've been using it for like two years and I have no damage from it.
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u/LeoPlathasbeentaken 15h ago
Exactly this. My printer is in a semi public space at my wife's work. I keep the plastic blades there for other people to use since i dont trust them, but i have a metal one because it works much better for myself to use.
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u/Snobolski 13h ago
The first tool I try is a "weeding" pick tool from a Cricut tool set. I can usually pick one edge enough where it will lift, then slip a spatula under that corner or just pop it off with the pick.
If that doesn't work, single edge razor blade.
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u/crazyates88 14h ago
I used to work for a school fixing Chromebooks, and we used these all the times to remove stickers from the Chromebooks. Metal razers would dig into the plastic or rubber and damage the laptop.
I got sick of removing hundreds of stickers every summer so we made the students remove the stickers and clean the laptops before turning them in at the end of the school year.
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u/trixster87 11h ago
I dont use any scraper. I use a painters pallet knife - the have thin flexible blade and makes it easy to get under the print Since the edge is rounded not sharp there is little risk to gouging yourself or the bed/print.
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u/SGYdesign 6h ago
The plastic blades are great and I use them alot, but the handles/ blade holders are trash, thankfully you can just print a better one.
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u/PocketSandThroatKick 15h ago
I just bought these and was super disappointed. Hopefully moving it to the 3d printer will help. They are worthless for other things.
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u/wekilledbambi03 14h ago
Why are you all using scrapers still? Are we still using glue on glass beds?
Nowadays there is almost no excuse to even need a scraper. Almost every printer now has removable flexible build plates. Hell, half of my prints release themselves completely after the bed cools.
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u/Optimesh 13h ago
Hi. I have a scraper like that. Itās shit.
Thank you for coming to my TED talk.
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u/Blackdragon1400 12h ago
You must not be using it right because Iāve never had issues in years. You should take the plate off and flex it to release large pieces, the scraper is just for stuck/small parts or lifting up an edge
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u/notJsons 15h ago
Those orange blades suck, try getting the black plastic blades. Much more sturdy and donāt get dull as fast.
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u/BlankiesWoW 15h ago
I use a paint spatula and it works better than any metal or plastic razer blades ive ever used, including the ones in the OP
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u/diablobsb 13h ago
I have exactly this one but I can't really remove scraps of petg from the bed with it.
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u/ToughStage7857 10h ago
Have been 3d printing for over 8 years and have never used a scraper....
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u/mysticblanket 9h ago
Yeah I still use a heated glass bed. I find it's still the best. Easy to clean, never warps, fantastic adhesion, amazing surface finish, parts just pop off the bed when it cools.
Never need to scrape anything, just clean the bed with soap and it's good lol.
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u/xStolen_Force_Skinx 8h ago
whatās your trusted manufacturer?
1600+ hours on my original PEI textured and the side i used most is finally starting to give a little I think š
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u/thrasherht Voron 0.181, Voron 0.238, Voron2.4401 10h ago
I took a utility blade, swiped it across sand paper sideways a few times to take the cutting edge off.
The blade is dull enough that you would need to try pretty hard to cut yourself, but doesn't give under pressure.
Even when trying, I can't damage my build plate with that setup, and it has yet to fail when scraping even single layer thin bits off my plate.
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u/EastCoastVandal 9h ago
I used the exact one from the photo on petg that was stuck to the bed and it did not go well.
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u/ChocoMammoth 8h ago
Damaging the build plate with metal scraper is a skill issue. I still use the blade that came with my A1 with a printed handle and the plate is still good.
Just work carefully with right angle, don't grind all over the plate like woodwork.
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u/EverettSeahawk 8h ago
I have yet to have a single print where a plastic scraper works and is also necessary. If a plastic scraper can do it, itās just as easily popped off with no scraper at all. If a scraper is needed at all, plastic is never strong enough to do it.
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u/frobnosticus 8h ago
I got a box of these some time ago and...I'm kinda shocked how often I reach for them instead of blades. They're perfectly reasonable box openers.
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u/thewashley 5h ago
PETG that is adhering a little too well to a textured PEI plate needs a bit more power than these little things can provide.
I will agree that you should start with these before escalating to the metal scraper.
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u/Historical_Wheel1090 4h ago
Using the right settings and let the plate cool completely off the printer before trying to remove it 99% of the time you won't need a scraper.
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u/Fallom_ 15h ago
I respect the idea but they absolutely suck ass.
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u/ZorbaTHut 14h ago
They're great until the blade gets banged up, then you flip it around, and then if it gets banged up again you toss it and grab a new one.
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u/ahora-mismo 13h ago
no, these are crap. metal blades are fine and if you have adult motor skills you can use them without scratching anything.
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u/Mogetfog 12h ago
The post feels like an adĀ
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u/Blackdragon1400 12h ago
Nah just something Iāve been meaning to share for years and finally got around to it.
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u/Liason774 15h ago
In the 10ish years I've owned a printer I have never, NEVER used a metal scraper or knife on my build plate. I get it if it's glass but for any Pei or textured surface you're just destroying the plate.
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u/popsicle_of_meat 15h ago
for any Pei or textured surface you're just destroying the plate.
No, you're not. Metal blades are totally fine as long as you actually take a second to be careful. I've used plastic and metal blades on my PEI plate. Plastic works when the material comes off easy and I just scrape quickly without thinking. If something sticks too much for that--which is not rare--I'll use the metal scraper. You only destroy the plate if you're not being careful.
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u/thenightgaunt Plywood Printrbot Simple 1405 15h ago
Yeah these things are magic. Only thing ive found that perfectly remove filament from one of those supertak cold plates.
Its offputtting how good they are. And how much better they are then metal blades. It makes zero sense, but they just work better. Weird I know.
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u/SmoothCdn 15h ago
I just ordered a set of these last week from AliExpress. Itāll take a while to get here, but only cost $1 for 10 ābladesā
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u/Background-Entry-344 15h ago
Instruction unclear, tried to shave with plastic scrapper, skin is red, very irritated, and beard still here.
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u/incubusfc 15h ago
These are my go to. They stay sharp forever when peeling prints. Never had an issue with them damaging the plate or anything else. They work especially well for that first layer that stays stuck to my cool plate.
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u/YellowBreakfast It's in three dee! 15h ago
These are amazing fro removing stickers and residue from so many things.
Gentle yet functional.
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u/narrow_octopus 15h ago
I got these for work and they work incredibly well haven't used them on my print bed yet but I am seriously impressed I think I'm going to buy some for my home
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u/Yes-its-really-me 15h ago
YOU'RE ALL WRONG!!
Look up "beekeeping j-hook" on Amazon. (I won't link one cos different countries etc).
It's stainless steel, fully rigid, never warps or breaks, doesn't get chunks out of it like a plastic scraper can (that's why they come in multi packs - they don't last) and isn't sharp enough to damage the bed.
Have been using 1, across all my printers, with super grippy cryoplates, for close to 14k hours of printing this last year, and it's still perfect.
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u/timtucker_com 15h ago
A plastic drywall knife has worked pretty well for me -- the plastic razor blades are sometimes a little more flimsy and usually don't reach quite as far.
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u/PerspectiveLayer 15h ago
There are great for removing brims, skirts and 1layer tall support bases without touching the buildplates with hands. The edge is sharp enough to do it without pulling the plate out of printer most of the time. I like em.
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u/ender4171 15h ago
FYI, these still can and will cut skin if you are careless, particularly if you jam yourself with the corners. Don't ask me how I know.
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u/fuocoso 14h ago
Haha interesting seeing the two sides - I bought a sleeve of those like ten years ago and just had to get more, I use them everywhere. They're good at getting sticky gunk off basically anything and they actually work ok as blades if you're cutting hear shrink tubing. I love em, hundreds of uses outside of printing and I use them there too.
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u/MeasurementAgile7759 14h ago
tried these once and they just bent under anything remotely stuck. flex plate gang over here, pop and done.
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u/Decimus_Magnus 14h ago
I buy the nylon razor blade refills from Amazon though I haven't gone through a pack yet.
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u/TraditionalSeat 14h ago
I run a print farm of 50 printers and this one is my favorite after trying quite few. I only use the plastic ones on these and I like this one because it's very sturdy and easy to swap blades. The storage in the handle is a nice bonus. https://www.amazon.com/gp/product/B0F2H1SRRR/
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u/LieutenantCrash 13h ago
I bought a pack of 100 of these and they're great! No more damage to my build plate!
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u/BleakFlamingo 13h ago
I've used these for years, long before I got a 3DP. Stickers, labels, price tags, unidentified goobers ...
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u/LimitedEditionSauce 13h ago
I got this exact set on Amazon and I suspect itāll last me my whole life lol.
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u/Snobolski 13h ago
I already have single-edge razor blades and blade holders in my shop for razor-blade tasks. I haven't used the plastic ones but I'd hazard a guess that a "real" razor blade lasts a lot longer than a plastic one.
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u/Jesustron 13h ago
I dont use any blades of any kind, never have, dont' understand anyone who does. This type of stuff is for beginners who don't have the process down and understood.
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u/holiestMaria 12h ago
I dont think those will give me a clean shave... or any shave for that matter.
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u/Bfromtheblock 12h ago
No thanks, I like the feeling of jamming stuff under my finger nails, bonus points if it bleeds.Ā Ā
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u/Lonewolf2nd 12h ago
Never had to use a scraper to get my print of my printbed. I've printed PLA PETG ASA ABS PETG-CF, on smooth or satin steel sheets. Flex it and done.
For TPU I use a bit of IPA on the sides, wiggle a little and it releases.
Maybe other filaments are harder to remove, like Nylon, but never tried that filament yet.
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u/Schnitzhole 12h ago
90% of the time Iām using a scraper to get off stuck prints. Iāve tried plastic and it was near useless for anything I couldnāt pry off by hand.
The plastic dings, warps, and isnāt sharp enough to cleanly get under the print so i can wedge it up.
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u/LowSignificance4671 Bambu A1 Mini + AMS Lite š¦ 12h ago
Or donāt use a scraper at all! Thereās a novel idea!
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u/soul_in_a_fishbowl 12h ago
Nah the best one is actually the long one from this set: https://a.co/d/023zCaS8 I donāt know why they donāt sell it separately. Itās the absolute best scraper you will ever buy and youāll wonder why you put up with anything else
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u/CultofCedar 12h ago
Havenāt had issues with the one I printed and it has swappable ābladesā. I actually used it to shave off like half an ice or ice from my deep freezer last night lmao. Sometimes I use metal ones though. Itās a non issue if youāre careful/gentle but accidents happen. Not something thatās ever really bothered me since Iāve collected a number of plates of the years lol.
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u/Coloredcontrollers 11h ago
After looking at it too many times during microcenter trips I sucked it up and bought the BQ scraper. I know it's a little fancy and unnecessary, but I have enjoyed having it so far lol
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u/minilogique custom Trident Three-Fiddy / Sovol Zero 11h ago
no thx, Iāll use my flat metal clay spade.
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u/RoamingBison Mars 4 Ultra, Bambu P1S, Athena A1 12k, Phrozen Mini 8KS 11h ago
Been using these for years, mostly for brims and purge lines or calibration lines. I've never needed a metal tool to remove prints from my PEI sheets since upgrading beyond the crappy glass printbeds.
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u/HapreyCoolie 11h ago
How do you get to the point where you need a scraper? Only had difficulties, like, twice in 8 year of printing... Am I doing something wrong?!?
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u/Remote-Climate-135 11h ago
Using metal one from Bambu lab for 2 years and works great. No scratches so far
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u/ImALeaf_OnTheWind 11h ago
I printed the handle that hangs from my Bambu door handle and put these extra wide scraper blades in. My favorite non destructive scraper so far.
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u/Purfectenschlag 11h ago
I know I'm late to the convo but wanted to mention when I got into 3D printing I tried a bunch of print yourself or store bought options for a reliable way to safely remove and scrape clean the plate without doing any damage. After trying a bunch of stuff, I eventually found an bought this and it's literally the only tool I ever need now to safely remove and clear/scrape the plate without doing any damage at all.
I'm so glad I found it that I just wanted to share with others. https://www.amazon.com/dp/B0BFDVX2H9
I have zero affiliation with this tool and brand, just a fan of its function.
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u/Planet-666 FlashForge Adventurer 5m 11h ago
can confirm , got a free box and there's so many blades that came with
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u/Alarming_Role_3971 11h ago
I have a blade dispenser for my plastic blades. Itās silly really as I think Iāve used one blade in like 6 months
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u/bluewing Klipperized Prusa Mk3s & Bambu A1 mini 11h ago
Metal can be detrimental to your plates if you are careless or hoof-handed. Or perhaps both. We don't discriminate here.
Plastic blades last nowhere near as long as one properly dulled metal edge held in properly designed handle. And by properly dulled edge, I mean rub it on a rock until you have a small radiused edge on it. Then do a search for scraper handle on like Makers world or Printables to find a proper handle that encourages you to hold the blade near flat on the plate.
I'm still using the the metal blade that came with my A1 Mini for the last two years. It took maybe a minute of time on a sharpening stone to get a nice radius on the edge. And then I just needed to print a new handle that was better than what came with the machine.
I wonder how many plastic blades I would have needed to print over that time?
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u/Tomytom99 11h ago
As a bonus, these things have so many other uses
I originally got mine for removing stickers from cars
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u/RebelWithoutAClue 10h ago
I took the edge down on my steel razor with some 4000x polishing paper. I also took back the sharp corners (with coarser paper) so they wouldn't dig into the build plate.
All told, a slightly radiused edged razor without sharp corners has lasted me years of printing without every scratching a build plate.
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u/Macktologist 10h ago
If I get stupid and donāt have my supporting hand clear of a slip (forgetting Boy Scout training)and I slip, will these make me pay the price I deserve to pay for being stupid?
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u/josocustomdesign 10h ago
I have the same set but I use it to remove stickers and leftover adhesives on walls.l. They are very goodĀ I still use my razor. It's all about the techniques and angle. Once you've mastered it, nothing beats a razor scraper.Ā
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u/street_racer221 10h ago
I got some and so far theyre great. Im sure ill find its limitations at some point tho
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u/Stampy_bird 10h ago
I donāt use razor blades because theyāre a little too flat and donāt give me the control. I need for the more stock bits. I just use a switchblade because I have finer control over exactly what parts get affected and if needed, I can put all the force on a single spot
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u/hornetjockey 10h ago
Never used a razor blade once, but probably wonāt use a 3d printed scraper ever again either. I use a plastic scraper from the hardware store. If I canāt get under the print with that, I will carefully pry up a corner with my pocket knife and go back to the scraper.
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u/philnolan3d 9h ago
I have these and like them for some purposes but for others I still need metal.
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u/Bananaland_Man 9h ago
Plastic is so bad at removing paper. Sure, freshly made? It'll do maybe 1/3rd of a wall... but after that, it's done for, whereas classic sharp steel gets it done for many many walls.
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u/ImRightYoureStupid 9h ago
And stop using soaps or solvents to clean your bed, it was fine back in the day, but now youāll just ruin the coating they put on it.
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u/ItsTheSolo 8h ago
I remember the first time I used a scraper, I had no idea it was razer sharp. Pushed that shit into the handle full force. It's a surprise my thumb still has feeling.
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u/pedro8 8h ago
No, plastic scrapers are not worth it. I use 0,2mm thick and 80mm wide scraper blade that is made for cleaning class surfaces (the brand name for the blade is 'handy'). Also made a holder that allows the blade to be almost in no angle to the bed and sticks out a little more then normal holders. It's the best tool to use. It also doesn't leave marks on the PEI plate.
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u/Mouthshits 8h ago
I used to prep VR38DETT timing covers for powder coating when I worked a shop. These little things were life savers for those little crevices getting all that RTV off. They also work kinda great for when you are using aircraft remover on motorcycle frames and scraping off all the old frame paint.
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u/Bramble0804 15h ago
Plastic doesn't shave very well