Ilford Multigrade Filter Set – 3.5 x 3.5in

Introduction

Contrast control with multigrade and variable contrast black & white photographic papers can be achieved in several ways with the Ilford Multigrade Filter Set. One of the most widely used ways is through the use multigrade or variable contrast hand filters.

• A magenta filter absorbs green light and transmits blue;
• A yellow filter absorbs blue light and transmits green.
• In this way, high and low contrast images can be made.

Ilford produces twelve Multigrade filters that are numbered 00 – 5 in 1/2 steps, with the lowest filter number corresponding to the softest contrast.

Filters are available in sets of filters 3-1/2 x 3-1/2inch (8.9 x 8.9cm) and 6 x 6inch (15.2 x 15.2cm ). They can be used above or below the lens and can be cut to fit the enlarger filter drawer.

Filter sizes 12 x 12inch (30 x 30cm ) are available to special order. .

Multigrade filters are very easy to use: no complicated calculations are needed when changing from one filter to another. The exposure time for filters 00 – 31/2 is the same; that for filters 4 – 5 is double.