RLyon
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Silicone masking material- with alkaline lift?
Here's a hard one. Looking for a resist liquid that I can use on *cured* two part platinum silicone three dimensional shape (Think skull, not circuit
board) that will flow (like an ink)- and presumably dry with some decent adhesion.
AND that can also resist a highly acidic underwater environment as this is essentially for masking out areas in an electroplating bath.
Id like to be able to also easily remove the resist as needed with a minimum of volatile chemicals.
Right now my only working option is more two part silicone, which needs to be peeled off- but id like some thing that can be removed with a solvent-
or ideally Im guessing an alkaline wash...
any ideas?
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Cathoderay
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Have you considered a type of wax?
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RLyon
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getting anything to stick to the silicone other than silicone has been hard. The wax would need to be sort of sticky- maybe like a museum wax? And it
would be hard to draw with unless it was hot...
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bariumbromate
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nurdrage has a video on making silver ink https://www.youtube.com/watch?v=EBlqPS8boLI
paint on and heat to 100 degrees in a oven once electroplating is done use ammonia to wash silver off if your electroplating metal does not interact
with ammonia
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bnull
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| Quote: | | (...) silver ink (...) |
Won't work. Silver ink is conductive and what @RLyon needs is an insulating substance. If they are using an electroless deposition followed by
electroplating, it will mess things up. They could use it to draw the patterns on the surface, of course, but it may be much more work than needed.
@RLyon: Have you tried nail polish? Soluble in acetone, easy to peel off. I considered that for my PCB etching but bought cheap CD markers instead.
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Twospoons
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Would a grease like lanolin work for you? Its very water repellant, and sticky. Whether it would survive an acid bath is something you would have to
try.
Helicopter: "helico" -> spiral, "pter" -> with wings
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RLyon
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I think nail polish is probably going to be the best bet. If it falls off the silicone it will at least stay together and not fall apart into tiny
bits in the bath which can cause its own problems. Ill give it a try!
Thanks
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RLyon
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@Twospoons how would one remove the lanolin after the fact?
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Twospoons
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Probably any organic solvent would remove the lanolin. You'd have to test, of course. I'd try isopropanol first.
Helicopter: "helico" -> spiral, "pter" -> with wings
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