Milky ultra soft urethane hardens with 2 liquids of hardening agent and main agent. Can be filled with pigments and stained. (Weight Contrast) The curing agent is 1 to the main agent 3. Be sure to observe this ratio. When measuring on a desktop electronic scale with paper cups, etc., there may be slight differences depending on the working conditions. When this happens, please make sure that the hardener is more comfortable. Less hardening agent may not harden. No matter where you store it, the "measurements are strictly" is iron. For tinting the pigment is an appropriate amount of up to 1% of the main agent. Mix the pigment into the main agent, and then add the hardener when the color gets caught. Fill with hardener and mix well, then put into mold. It takes to fully cure on an average of 5 hours in summer and 8-9 hours in winter. It will not harden in temperatures below 30°F (10°C), so when working in winter, please always cure in a high temperature.