These FISC Silicone Pigments (AKA Functional Intrinsic Skin Colors) are the fundamental basics of all human skin tones. Adding a few drops of these pigments to your clear Platinum silicone will give you an accurate foundation to mimic human flesh. Mixing ratio is 2 to 3 drops per 10 grams of catalyzed silicone, (2 drops of pigments for softer silicones or silicone with additives). These pigments go a long way. One 30 grams bottle can tint over 3,300 grams of catalyzed silicone (or approx. 7.2 pounds or 116.4 oz). S-300 thru S-310 are accurate skin colors. The SFX Skin Bases S-311 thru S-314 are great for special effects like dead corpses and the like. We know how you zombie folk do.