Post #280460 by VanTiki on Tue, Jan 23, 2007 11:02 AM

Hey -

I'll throw in my 2 cents on tinting casting resin/urethanes - a little goes a long way! I'd add just a drop or 2 to a "big-gulp" sized batch. Too much can affect the setting of the resin (but I've only heard this - never experienced it). Most importantly, you need to tint a small batch, mix it, and let it set up before you can see the final color. Most casting urethanes change color when they set - so it can be tricky to tint them when you are adding color in the liquid state. Also - mix the tint in well - I usually would fully mix the tint into the A (or B) cup before mixing the resin together. If you try to add tint and mix the AB together in one go you may end up with unmixed globs of tint while racing the "set up" clock! Write down how much tint you are adding and the batch size, so you can compare notes later.

Good luck!