Colour Enlargers
Calibration figures for single-filter settings on colour enlargers.
These figures can be used as starting points for your own calibration. We actually recommend the use of dual-filtration to keep exposure times reasonably constant across the grades, but the use of single filters will reduce exposure times considerably for medium contrast grades.
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Please note: The above figures are to be regarded as starting points only, and actual values will depend on the characteristics of your enlarger, your working methods and materials.