This is the most frequently question asked and rightfully so!! Unfortunately there's no standard calculation when mixing pigments due to the numerous applications, and mediums that our pigments can be used with. I.E. Automotive, Epoxy, Resin, Slime, Candles, Soaps, Fishing Lures, Woodworking, Pen Blanks, Acrylic, Varnish, Clay, Grout, Flooring, Countertops, Cosmetics, Fingernail Polish, etc. the list goes on.
UV Stable / Made for Automotive : No
Epoxy / Resin : 1 gr per 8 oz / add as necessary
FDA U.S. Permitted for External, Eye Area, General to include lips, Bath Bombs : No
CP Soap Rate Usage : 1–2 tsp. per pound of oils
MP Soap Rate Usage : ¼–½ tsp per pound
If you're using these for epoxy resin projects and find that the pigments are "chunky" or difficult to break down, try putting the pigments in a cup and putting a little denatured alcohol over the pigments and stir. This should help solve the issue.
We do NOT recommend using these pigments for projects that will be consistently in the sun due to UV stability.