Acrylic paint dries very quickly. To slow the process and give yourself more time to achieve good results, you can add transparent Slow Drying Gel to your colour. The Gel is added directly to the colour and thoroughly mixed on the palette. Increasing proportions of the gel to colour will increase transparency and reduce the viscosity of the colour. Film thickness, temperature and humidity all contribute to drying time, as does the degree of absorbency of the surface. Drying times cannot therefore be accurately determined, thus experimentation and experience will be required.