Ilford Multigrade Filters - 6 x 6 with:
Ilford Multigrade Filters - 6 x 6
The Ilford Multigrade Filters will help you to achieve the best contrast possible when making black and white prints. The twelve Multigrade Filters are numbered 00 to 5 in 1/2 steps. The lowest filter number corresponds to the softest contrast, and the highest filter number corresponds to the most contrast.
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 to 3 1/2 is the same, and the exposure time for filters 4 to 5 is double.