i worked as the lab-guy of a portrait studio throughout 1988-9. she shot large format film and was trained in the 20s-30s ....
i must have put thousands of sheets of 5x7 tri-x and hundred sheets of 4x5 tri-x through the stuff. as previously stated, it is a beautiful developer for portraits. we used to "deep-tank & hanger" our film ... and like a lot of developers out there, we used to "mellow" the new stuff with 1/3 tank of olde developer. it worked really well to lessen the contrasty-ness of the developer. if you find your film contrasty, even after you reduce your time &C, you might consider cutting your new developer with a little exhausted-stuff. folks used to do this sort of thing with "harvey's panthermic 777" too ...
its been a really long time and i have no idea what the times/temps were, but i am sure what has been suggested will be good starting points.
"One of the painful things about our time is that those who feel certainty are stupid,
and those with any imagination and understanding are filled with doubt and indecision"
please disregard the part of my last post where i gave explicit instructions on how to de-contrast the developer ... i don't know what i was thinking giving away trade secrets.
Originally Posted by df cardwell
DK-50 was originally intended for medium and large format negatives and may provide too much grain for 35mm negatives. However, the following modification produces an acutance developer similar to the Beutler and FX-1 formulas which IS suitable for 35mm format.
Kodak DK-50 As An Acutance Developer
DK-50 may be used as an acutance developer when diluted 1+4 and with the sodium metaborate concentration adjusted to its original concentration. This modification provides a useful balance of acutance, gradation and speed with a controlled contrast rise.
Rate films at their normal ISO speed.
Stock Solution A
Stock Solution B
Distilled water (50°C) ................. 800 ml
Kodak Balanced Alkali .................. 80.0 g
Distilled water to make ................ 1.0 l
Take 2 parts of Solution A, 1 part of Solution B, and 7 parts water. Use once
and discard. Average development time is 8 to 13 minutes at 20°C.
British Journal of Photography Annual 1972, p 230.