This link was just posted on LE, but I thought I'd put it here too, in case anyone was interested ;)
Lots of good tips on working Glass Alchemy colours, and many of the tips work well for similar colours from the other suppliers too.
http://frittsartglass.com/marbles/articles/Borosilicate.PDF (http://frittsartglass.com/marbles/articles/Borosilicate.PDF)