Is this washer archival??
Archival Print Washer
Thats what its designed for. Of course, you have to leave prints in the wash long enough, as you would any archival washer. The drain is on the bottom and the drum is designed to rotate for hours on end, all day.
Originally Posted by Bighead
So there is a constant flow of fresh water??
I used this washer at college, it is archival if you alone are washing prints and you are sure it drains from the bottom as fresh is added, at school there always was the person who would print late and add their prints to the mix and piss everyone off.
As well the constant rotation may ding some corners but if it was closer to me I would pick it up. go for it.
"Archival" washing is controlled by the diffusion rate - it doesn't matter if the water is running or not as long as the thiosulfate concentration in the water is lower than in the emulsion.
In other words: Time is more important than movement.
Incidentally it has been found that paper with a (very) small remaining thiosulfate content is more archival than when all the thiosulfate has been washed out.
-- Ole Tjugen, Luddite Elitist
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test to be sure
Being archival is a technique that includes all of the prior steps as well as washing. To be sure one should test both fixing as well as washing. This, I feel, is true regardless of the techniques or washer being employed.
If you have the time and energy and are willing to shuffle prints and change water by dumping and refilling at appropriate intervals, the use of a single tray can provide the best possible wash. Conversely. the finest print washer can give terrible results as far a thoroughness when poorly used..
Originally Posted by Bighead
[font="]Yes. There are valves to control the flow rate. Drains from the bottom. Motor can run all day. I don't know how many prints it can do but would guess more that one person could put out. Plenty of room in the drum which must be 21 inches across and 18 inches in diameter.
I would guess that at the end of the day, you would shut both valves rather than refill everyday.
IMHO, it’s an impressive print washer.[/font]
I have used this type of washer a lot in the old days. It uses a lot of water and often the prints stick together. Also, prints occasionlly would have damaged coners.
This seems to be similar to the huge print washer in my school, different design but made for lots of washing... I hypoclear all prints, constant agitation for 5 minutes, to reduce wash time to 20 minutes, as opposed to an hour (for fiber)....
Damage is possible in the school washer as well. I dodge other students washes, in order to do a wash of my own (and maybe my girlfriends, if I'm feeling generous)
Thank you everyone for you input....
A single tray? Though I do process single tray, where more than
Originally Posted by Claire Senft
one print is involved I think two trays make for a more efficient use
of time. I use hydrophobic seperator sheets; one at bottom and top
of stack, and one twixt each print. Once placed the prints are not
disturbed untill moved to the second tray. They see the first tray
one more time then are done; three washes.
I preceed the wash with a fix of A. Thiosulfate concentrate
diluted 1:49. A rinse, a hca, a rinse, ALL one-shot, follow. The still
water diffusion method of washing is, I believe, the most sure way
to a uniformly archival washed print; no bubbles no eddies. Also,
the Still Water Diffusion way of washing needs no plumbing,
costs nothing, and uses very little water. Dan