Add 2 drops per pound in melted paraffin or soy under 180°F. Start small - a little goes a long way! These are very concentrated colors. Colors may vary by monitor! 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.