For printing ILFORD MULTIGRADE range of papers on unconverted black-and-white enlargers, ILFORD have produced complete sets of filters for all contrast grades in half grade steps. MULTIGRADE filters are supplied in 3 inch and 6 inch square sizes to fit most enlarger's filter drawers, and as a set of mounted filters for below-lens use with a filter holder. MULTIGRADE filters do not require any recalculation of exposure times when changing between grades 0 and 3, grades 4 to 5 simply requiring twice the exposure.