Ilford Multigrade Filter Set
Contrast control with multigrade and variable contrast black & white photographic papers can be achieved in several ways. 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 3-1/2" (8.9 x 8.9cm) and 6 x 6" (15.2 x 15.2cm ). They can be used above or below the lens and can be cut to fit the enlarger filter drawer.
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