hoffy
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You really need to run residual hypo tests on a "washed" print to determine if your method is up to standards or not.
............what do people do when the wash with a siphon?
My take:
Using a tray siphon should be fine if it is functioning properly, if you wash long enough, and if you ensure that the back of the print gets as much exposure to the wash water as the front. Don't leave it stuck to the bottom of the tray, turn it periodically.
Your times are too short unless you are using the rather wasteful Ilford sequence and TESTING to make sure that there is acceptable residual hypo.
Print washers for fiber-base prints are well worth the investment if you want to wash more than one print at a time. eBay is full of them. Once you have one, you'll never go back. Buy one for the largest size you regularly print.
Fiber-base papers take more care with fixation. Two-bath fixation is standard and less wasteful than the Ilford sequence (as well as presenting less chance of working your fixer to exhaustion without realizing it). I use rapid fixers and fix in each bath for 1.5-2 minutes. This is followed by selenium toning, a rinse, a bath in wash aid for 10 minutes (or longer, sometimes I let the prints collect in the hypo-clear) and then a wash in an "archival" washer for minimum of one hour. Finally, a rinse in Sistan (a stabilizer) and then squeegee and dry.
My last residual hypo (HT-2) test (done before the stabilizer step), at one hour, showed no stain for any of the papers I use. The residual silver test also showed no stain, meaning my fixing sequence is adequate.
Hope this helps,
Doremus Scudder
www.DoremusScudder.com
That is the other thing test strips are for.OK. What is the best way to determine whether the middle of the print is being washed sufficiently? Do I have to sacrifice a sheet?
Diffusion! absolutely. It takes time. After fixing, I just give the print a quick rinse , like 1 minute in 20C running water and the directly into Se 1:3 mixed with Hypo clear. Then 3 to 5 minutes in fresh working strength Hypo Clearing Agent. (If you get staining from the toner print isn't fixed) Then quick tray wash to get most of the chemicals washed off. Then into an archival print washer. I fill the washer with water, then I turn on a circulation pump, creates nice flow of water across the prints. Every 5 to 10 minutes empty all the water from the washer and refill. Usually 6 cycles.I use 4"x5" or larger test "strips".
But more importantly, effective washing is actually a process of diffusion. So with the exception of a situation where a part of your print was excluded from the wash water, a test done on any part of the print should reveal useful information.
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