3DPrinting

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3DPrinting is a place where makers of all skill levels and walks of life can learn about and discuss 3D printing and development of 3D printed parts and devices.

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Finishing TPU (lemmings.world)

submitted 1 year ago by moody@lemmings.world to c/3dprinting@lemmy.world

5 comments fedilink hide all child comments

I know that paint doesn't work well with TPU and that the typical way to color a piece is with dye. Does anyone have experience decorating prints that will see heavy use? Like if I wanted to use multiple colors, can dyes be brushed on similar to how one might hand paint a model? Is there a better way to do what I want?

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[–] FuglyDuck@lemmy.world 5 points 1 year ago* (last edited 1 year ago) (1 children)

Soaking is probably going to produce a much better/more durable finish than painting-on. You can use some sort of masking layer to shield sections you don't want dyed (or died different colors.) the problem with painting on is it's going to need more time to soak in to the part, than paint that merely dries onto the surface.

RIT dyes have worked okay for me. My process was to paint on masking fluid and let it soak in a hot dye bath. The fluid dries into what is basically a latex rubber coating that can then get rubbed off.

[–] moody@lemmings.world 1 points 1 year ago (1 children)

I'm not really concerned about how long it takes to do the work, but I like the masking idea.

[–] FuglyDuck@lemmy.world 4 points 1 year ago (1 children)

It’s not really “work”- so much as an ocd level of attention to extremely tedious details.

Some tips: print off a small parts with all the same kind of features as the final bits so you can see how it takes. Then use a white or natural color filament- the brighter the white, the more brilliant the final color will be. Especially important for light colors like cyan or yellow.

[–] Rodeo@lemmy.ca 0 points 1 year ago (1 children)

the color scheme is CMYK not rbg

You mean for the dyes? I thought this color schemes were for representing colors on a screen, not for physical dyes.

[–] FuglyDuck@lemmy.world 2 points 1 year ago* (last edited 1 year ago)

RBG is the digital. CMYK is print and paint.

edit to clarify: RBG is additive color. Think of it as RBGW leds- when you mix light from the source, red blue and green =white. CMYK is subtractive, IE, the color you see is what's left behind after it hits a surface and bounces off. this is why when you mix red green and blue paint, you get brown, rather than black.