The Tiffen EK1665520T Photographic Step Tablet Calibration Device is a handy and vital tool to have in your darkroom when you are printing color or black and white. The gray scale helps you determine proper exposure and shows you where adjustments are needed.They are available in different increments depending on how large your print is and how precise your calibrations need to be.
Useful for making color prints when gray scale is not present in original image
Use for sensitometric or densitometric applications
Excellent for making internegatives