Developing Acros to a Specific Negative Density

[tgtaylor]

If you were able to exactly duplicate the conditions of development described by Fuji, and assuming you are interested in an alternative process like vandyke, kallitype or pure palladium, you should develop for a Contrast Index of about 80 - .95. This should get you in the ball park with vandyke, kallitype or pure palladium for scenes of average contrast.

However, if you want to do it right you should first determine the ES (exposure scale) of your specific process and chemistry, then learn to develop your negatives to a CI that matches the ES, adjusting for conditions of subject brightness. Purchase of a 21 step transmission step wedge, and learning to use it, would be a good first step. You would answer a lot of your questions with this exercise.

Sandy

Thanks Sandy! That makes mathematical sense from the published graphical data. I've put off purchasing the step wedge but I really should get one.

Thomas

[sanking]

Thanks Sandy! That makes mathematical sense from the published graphical data. I've put off purchasing the step wedge but I really should get one.

Thomas

I have found step wedges to be extremely useful tools in alternative printing. Stouffer has them in various sizes. http://www.stouffer.net/TransPage.htm.

Sandy