Fraser
Well-known
Just got back into printing using Champion Multicontrast Paper Developer and Champion Amfix can't seem to find any developing or fixing times. anyone now a web page or the answer.
Thanks
Thanks
Chris101
summicronia
Dilute the concentrate 1+9 and then develop by inspection under safelight. I'll bet it's 1.5-2 minutes, but experiment by increasing 30 seconds each time until you see little change.
Fraser
Well-known
Thats what I reckoned.
Chris101
summicronia
Dead reckoning works about 30% of the time.
Freakscene
Obscure member
Develop to completion. Fix for 2x the clearing time. For paper, check the clearing time by setting up stop bath, fixer, water and paper developer in trays. Take out a sheet of paper and cut a strip off. Seal the rest of the paper and turn the lights on. Put a series of lines on the paper on the back, using 5 or 10 second increments from 0-1 minute for rapid fixer (or 20s increments to ~3 minutes for sodium thiosulfate fixer). Wear gloves and take other appropriate safety precautions. Put the strip in the stop bath as per your normal regime (30s - one minute with agitation, likely). Set up your timer. Starting with the end with the larger numbers on it, feed it into the fixer as per the lines on the paper, so each number corresponds to the number of second in the fixer. After the last section has gone into the fixer for the appropriate period, put the strip into the water tray and agitate for 1 minute. Now put the strip into the developer and develop to completion. Stop again, rinse again. Examine in good light. If you got it right, you'll have a section that is paper white, and others that are grey or black. The white section with the shortest fixing time is the clearing time for fresh fixer. You then fix for 2x this (or whatever the manufacturer recommends). If the whole paper strip is white you have fixed all of it longer than the clearing time. If the paper strip is all grey or black you have not fixed for long enough to reach the clearing time.
Make a record of the paper type, fixer type and concentration, the clearing time and date. You can re-fix the strip, wash and dry it if you want to keep it.
This sounds complicated but it takes about 10-15 minutes, and is well worthwhile.
Marty
Make a record of the paper type, fixer type and concentration, the clearing time and date. You can re-fix the strip, wash and dry it if you want to keep it.
This sounds complicated but it takes about 10-15 minutes, and is well worthwhile.
Marty