Jasart Byron Crackle Medium creates a unique cracking effect when applied to your work. Can be used all over your artwork to create a vintage, aged look or mixed with acrylic paints for a more controlled application. When adding to your acrylic paint, mix two parts medium to one part paint. Best results acheived with cool air flow during application. A thin layer will produce smaller cracks, a thick layer will produce larger cracks. Can be applied with a paint brush or palette knife. Results are visible after 24 hours. Suitable for use on canvas, paper and wood. Best results are acheived on hard surfaces. Available in 250ml & 500ml.