Rainbow 1 is a CBS standard dichroic coating offered on ripple glass COE 90. Rainbow 1 fires to natural rainbow colors. This coating is offered on clear and black glass in a 4x4 inch square or a quarter sheet. There are approximately 66 square inches in a quarter sheet of glass. Please Note: All photos on black glass. We offer this coating on Uroborus ripple and Bullseye soft ripple. Soft ripple has much smoother hills and valleys. Please note availabilty when selecting products.