Add color to melted candle wax and stir completely. The recommended temperature for manufacturing with our liquid dyes is under 180° F. Dark: .05% Light: .005% IMPORTANT NOTE: (Applies to 1 ounce bottles only.) All 1 ounce bottles are now shipping in plastic bottles. The glass colorant bottle included has had Colorant in it - be cautious when opening. This bottle was included due to problems with leakage during shipping and for your use in storing the dropper. Any orders containing this colorant may be delayed up to 3 business days. Thank you for your understanding.