Ray Display Systems Pvt. Ltd. Supplies White Ceramic/ Organic Coated Board. Ray Display Systems Pvt. Ltd. Is the manufacturer of display systems and writing boards. White Ceramic / Organic Coated Board can be used as magnetic board cum write & wipe off writing board. White Ceramic/ Organic Coated Board can also be used as projection screens. These are scratch proof boards and have a very long life. It is a suitable solution for modern day presentations. It is available in various sizes.