Brian Nystrom ) writes:
MMC wrote:
Ah! I see that fiberglasssupply sells epoxy pigments! Thanks for the link!
And good info on the "tile board".
MMC

Pigments for polyester resin work fine with epoxy, too, and are
generally much less expensive.

I have some polyester pigmemt the consistency of thick syrup.
I assume it is titanium oxide powder suspended in polyester resin and
would not be suitable for use with epoxy. Does that sound right?
If so you'd have to be careful what kind of pigment to use.
If you buy powdered pigment that should be okay for both?

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William R. Watt wrote:
Brian Nystrom ) writes:

MMC wrote:

Ah! I see that fiberglasssupply sells epoxy pigments! Thanks for the link!
And good info on the "tile board".
MMC

Pigments for polyester resin work fine with epoxy, too, and are
generally much less expensive.


I have some polyester pigmemt the consistency of thick syrup.

Same here.

I assume it is titanium oxide powder suspended in polyester resin and
would not be suitable for use with epoxy. Does that sound right?

The stuff I have does not have the strong styrene smell of polyester
resin. It smells sweet, somewhat similar to latex paint. It was a
fraction of the price of the West Systems tint I bought, which smells
EXACTLY the same. AFAIK, these are universal pigments and work fine with
either type of resin (I'd bet they're exactly the same product).
Although I haven't tried it, I suspect they'll work just fine in paints
and varnishes, too.

If so you'd have to be careful what kind of pigment to use.

It doesn't seem that way, though perhaps there are pigments with
polyester or epoxy bases that would be incompatible with the other. I'd
say "let your nose be your guide".

If you buy powdered pigment that should be okay for both?

Sure. They're just harder to find and I would think more hassle to mix.
I have enough trouble keeping Cabosil in the mixing pot, let alone
adding powdered pigment to the mix. ;-)