- Joined
- Dec 19, 2017
- Messages
- 2,712
So this is only useful for straight darkroom printers? Digital printing offers all kinds of ways to modify edge contrast. You can even control edge sharpness selectively.
What sort of size do you need to print, before these effects are apparent? What do you do if the effect is too much?
And when you say"grain edge" does this mean the individual grains are rendered more sharply or that the transition from a light patch to a dark patch is enhanced, by Mackie lines? I thought this was related to very dilute (but standard) developer, used with very little agitation. I can recall seeing N-shaped graphs illustrating this but I also recall a suggestion that one of the lines doesn't exist and is a purely retinal effect. My apologies, but I can't remember the reference. Might have been a passing comment in the BJP...
I had believed that staining developers were used to control the contrast of tricky subjects, in the days of graded papers.
My experience is that Pyrocat HD negatives scan beautifully. A friend was using Precsysol (the datasheet was an exact copy of Sandy King's first version of Pyrocat HD - using Sodium rather than Potassium Carbonate). He was scanning all his negatives to make digital inter-negatives for Platinum printing
I'm currently scanning many of my negatives and I like the Pyrocat negative the best.
Ian