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Can I fix pigment to plastic?

This may be a stupid question, but I'm going to ask it anyway. I bought about $150 worth of candle-making supplies for $5  at an estate sale years ago, but I haven't used any of it for years, due mostly to the fact that I ruined most of the molds before I knew you needed a double-boiler. Oh well. Anyway, amongst all the wax and molds and wick, I got two or three bottles of powdered pigment. I'm now into circuit bending, and now I'm interested in decorating bent instruments. I've worked with paint pens and spray paint, but I thought it might be cool to use the pigment. I don't know how to use it, and I can't find anything about fixing pigment to plastic online.  
So, my questions are:
-Do I need to mix it in with glue or some fixative, or does it somehow stick to the plastic?
and
-If I sand the plastic, will the pigment stick in the wells created?



If nobody can answer, I can probably find a piece of scrap plastic to test it on, but I thought I might try asking here first.

Thanks,
Noahh

orksecurity6 years ago
If you mix pigment with glue, you've created either paint or stain, depending on the ratio and what glue you're using and Things Like That There.

The pigment is unlikely to adhere without some kind of binder. And the binder has to be one which sticks well to the plastic. Sanding it before painting may improve the bond, by giving more surface area to adhere to.

I'd save the pigment and look for a better place to use it.
RedMeanie6 years ago
The pigment you have is for adding to liquid plastics or wax to obtain a colored finished product. Just like stated above it needs a binder like having paint mixed. Other than that there is an "Instructable" covering how to dye plastics like circuit boards I believe using easy and cheap store bought RIT dye like for dyeing clothing. I also found out this can be used to dye rubber items too.

Hope that helps!