Concentrated color blocks work in paraffin, soy, palm and gel waxes. Color blocks are much stronger than dye chips and therefore more economical to use. Each block will color 15 lbs. of paraffin wax a deep shade, or 20lbs. of wax for a medium shade. Soy and palm waxes may require more color to acheive medium and dark shades than paraffin does while gel wax will require much less color to be used. Sold per block.