The bright polymer medium is made of 100% pure acrylic emulsion, which can reduce and increase the thickness (viscosity) of the acrylic pigment, and dry to a pure, flexible and glossy film with excellent water resistance and UV radiation protection properties. The addition of watercolor pigment or gouache pigment to the bright polymeric medium can increase the watercolor pigment and gouache pigment's water resistance and flexibility. Please test it before use.