Prism Sign We “Prism Sign” are a Sole Proprietorship firm engaged in manufacturing high quality array of Sign Boards, Acrylic Sign Boards, Acrylic Sign Boards, etc. Since our establishment in 2003 at Ahmedabad (Gujarat, India), we have been able to meet customer’s varied needs by providing products that are widely appreciated for their durability, fine finish and sturdiness. Under the strict direction of “Mr. Jagdish Bhai" (Proprietor), we have achieved an alleged name in the industry.