developing B&W
developing B&W
After a gap of several years I recently went back to developing my own B&W negs, but I was put off by an inability to avoid drying marks (and, to a lesser extent, dust). Any tips on this? I would like to go back to home developing, but I can get a pro service for around £5 per roll, so that makes me lazy about it.
I'd need to know more about what the drying marks look like...
But... common remedies are;
a.) Get a small bottle of Edwal LFN wetting agent, and put a drop into the last of your wash water. If you can't find or order the Edwal, a VERY small amount of liquid dish soap will do. I mean SMALL, like smearing a fraction of a drop onto your finger, and wiggling the finger into the final wash. A whole drop is TOOTOOMUCH!!!
I don't recommend Kodak's Photo Flo... it's a laquer, designed for old machine processors, that displaces water and makes a hard finish on the negatives. I have found (empirically) that it makes its own set of marks on film, in my various home darkrooms, and is more of a problem than not using a wetting agent.
b.) Don't dry with heat (film dryer, hair dryer). Hang 'em on a line, and then go out, or watch TV for an hour or two, or go make more pictures. Let 'em dry s-l-o-w-l-y.
c.) A lot of "marks" on film happen during the processing... don't use too elevated a temperature, and endevor to keep the developer, stop, fixer, and WASH WATER at within a degree of each other, in temperature.
Many people are scrupulous about developer temp, and then use room temp fix, and cold water to wash. This can leave marks on emulsions, and lead to "grain clumping".
HTH... Greg.