ThomasR Posted October 27, 2012 Share Posted October 27, 2012 Howdy all, I read in a few places about how marbling occors in colored plastic, but I found no answers on how to fix/compensate for it. If anyone has some pointers/information about it I'd be happy to be a knowlege sponge. -Thomas 8) Quote Link to comment Share on other sites More sharing options...
Monty Posted October 28, 2012 Share Posted October 28, 2012 (edited) Can you post up a pic of what you're talking about so we can try and help you? If you're talking about the swirling that occurs in silver-colored styrene, I don't believe any remedy exists except to paint over it. Edited October 29, 2012 by Monty Quote Link to comment Share on other sites More sharing options...
ThomasR Posted October 28, 2012 Author Share Posted October 28, 2012 I read some where that in blue/red/yellow plastics that the grain of the plastic creates a marbling effect. I wasnt sure if it would show through the primer and paint. -Thomas 8) Quote Link to comment Share on other sites More sharing options...
Art Anderson Posted October 28, 2012 Share Posted October 28, 2012 If you are talking about those strange looking "lines" with differing "surface" texturing (strong enough to be visible, but so fine as to defy your feeling them with your fingers--that's caused by the flow of molten styrene into the tool during the molding cycle. This shows up whenever model companies shoot metallic colored plastic into the molds--the metallic powder in the plastic flows and "swirls" as it fills the mold cavities (most noticeable on a body shell, with its rather large surface area. You can see the same effect by opening a bottle (or a can) of metallic paint--stir it, see how the metallic pigment powder swirls around, creates light and dark areas in the color. This is unavoidable, for the most part--it's characteristic of injection molding. Sometimes, this "swirling" effect can show through paints, particularly automotive lacquers used on a plastic model. But using an airbrush, and with practice, it can be virtually eliminated from showing through to the final paint finish, in my experience. Art Quote Link to comment Share on other sites More sharing options...
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