Paint for pigment?

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Pjohnson

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Joined
Feb 16, 2012
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278
Location
Plympton, MA
I believe this is so, based on what I have read - want to confirm ...

Can oil based paints be used as an opaque pigment for PR casting?
I have some metallic paint (copper) that I would like to use.

Thoughts and suggestions are welcome.

Thank you

PJ
 
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Bowl Slinger

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Mar 25, 2012
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591
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Seattle, WA
I have experimented with this and have found that each paint manufacture and believe it or not, color has an effect on the PR. I got this wild idea that fingernail polish would be a great coloring agent (between my wife and daughter there is an endless supply of some awesome colors) so I did some testing. The yellow, red, green set up fine. the purple and silver never got completely hard. The blue and black felt hard but when I started drilling, the small amount of heat caused the blank to soften and warp. The best advise that I can give you is to mix up a small batch and see how it comes out. Remember that even if it feels hard to drill and turn one before you spend the $ on a larger batch. I use 3/4" PVC pipe for my molds. It only takes 3oz of resin to fill a 6"X3/4" tube
 
Joined
Aug 25, 2011
Messages
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Location
Nashville, TN
I use artist oil paints to tint pr with no problems since I started using it about a year ago. I buy the mid grade from Michaels and you can catch a coupon to get the best prices. So far it only takes very small amounts to get the color I want, like 1/4" or less for any tint. I also like being able to mix colors to get the correct tint before you add it to the pr. I have not tried it with alumnilite yet but plan to try a small mix soon.
 

sumterdad

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Sep 1, 2011
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1,159
Location
sumter sc
If you use the artist style oil paint from michaels and hobby lobby what you want to make sure is that you use a small amount of resin in a cup then mix in your paint. if you dont you will get clumps and paint strings in the resin.and when i say small amount i mean less than a tea spoon. once you get it mixed good then you pour in the rest of your resin
 

Pjohnson

Member
Joined
Feb 16, 2012
Messages
278
Location
Plympton, MA
Paint mix update

So my update - the PR resin/paint dried solid after 24 hours. After casting I let in sit on top of my boiler. I think the heat aided in the curing process. It cut, drilled, and lathed well.

The issue I found was that some of the paint dried on a flat side and left several dimples that were not to my liking.

My recipe was a mix of mostly the copper paint in the resin and a small drizzle of macro pearl white. After mixing I realized that the metallic paint I used was latex not oil.

All in all I was somewhat please with the result and may try again. I have a copper euro kit and would like to match the blank. If anyone has any suggestions for a good blank color for copper I am all ears.

Many thanks for reading.

PJ
 
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