MULTIGRADE IV FB Fiber is a premium quality, variable contrast black and white paper on a 255g/m² fibre base. Fibre based papers have an appearance, weight and quality of their own... a 'hand crafted' look which immediately appeals to skilled printers and discriminating collectors...the exhibitors paper for exhibition prints. Part of the ILFORD MULTIGRADE system and fully compatible with all existing MULTIGRADE filters and equipment. Fact sheet : http://www.ilfordphoto.com/download.asp?n=34&f=20061302013402375.pdf