PRODUCT DESCRIPTION
The ILFORD MULTIGRADE FILTER SET comprises of 12 mounted contrast filters. It is a fantastic addition to any darkroom. With 12 evenly spaced, speed matched grades, these filters enable simple contrast control for all variable contrast papers and allow a wide range of negative types to be printed.
 
MULTIGRADE FILTERS are numbered 00–5 in ½ step increments with the lowest filter number corresponding to the softest contrast. They are easy to use with no complicated calculations required when changing from one filter to another - the exposure time for filters 00–3½ is the same which then simply doubles for filters 4–5.
 
MULTIGRADE FILTERS are also available in sets, 8.9 x 8.9cm (3½x3½”) and 15.2 x 15.2cm (6x6”), and can be used above or below the lens as well as cut to fit enlarger filter drawers as necessary. For further information on Multigrade filters, please refer to the contrast control data sheet
 
Ilford Multigrade Gelatin Filter Set 6 x 6" (12 Filters)
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.
 
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.