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washing prints device

Hi. I am making my new darkroom and i begin to remember what a pain in the ass is wash the fiber base prints for much time. I am thinking of doing myself some washing device for prints because in Argentina there are not such things like cascade washing prints. Any one knows a web page or ideas to make some washing device with the papers vertical in several slots?

by Hernan Zenteno at 2007-12-20 03:24:43 UTC (ed. Mar 12 2008 ) Buenos Aires , Argentina | Bookmark | | Report spam→

yeh, I’ve even modified and designed a print washer with FEM analysis on the fluid behavior (for fun, didn’t build it afterwards because I’m not printing so much yet)
I’ll point to you to a guide in italian (the language shouldn’t be a problem) on how to build one:
http://www.fotoavventure.it/freecontent/AT_Lava_baritate/Lava-baritate-AngeloT.pdf
and http://www.fotoavventure.it/freecontent/AT_Lava_baritate/lava_baritate_C%20Layout2.pdf

If you are seriously into building one then I could pass you a few suggestions to improve the water flow and the washing, let me know.

Ciao,
Alessandro

by alfa | 20 Dec 2007 12:12 | Torino, Italy | | Report spam→
Thanks Alesandro. You test this system? how the paper stay in the center of the slot? The water make some agitation with the flow? this is necessary to avoid little bubbles that make uneven wash. For what I understand the water goes from de bottom to the top, is no better the oposite? I found here another print washer. Any suggestions are welcome.

by Hernan Zenteno | 20 Dec 2007 14:12 | Buenos Aires, Argentina | | Report spam→
I’ve simulated the modified system, not tested it. But the creator of the system in the links uses it actively. The paper doesn’t need to stay in the center of the slot in the system that he created (but I’m sure he has an uneven water flow due to this). To avoid bubbles you need to regulate the water flow properly (at the entrance of the washer and near the holes on the lower part of the washer where you insert your papers).
The flux is from bottom to top so gravity helps to distribute the water throughout the washer. If you do it from top to bottom you just get many “waterfalls” but no watery environment with a constant flux (which is what you need to wash your print).

To improve what he has done you should center the entrance and the exit points (he has them on one side) so the flux distributes itself more properly and, possibly, evenly through the washer. Another modification would be to not create all those holes on the lower part. Just put one, well dimensioned, in the center of the long horizontal size or a couple around the center (if you do this be careful when you place your prints inside the chamber so they are centered). This way once the water passes through it will spread out around the print. Another adjustment could be to add a top, symmetric to the bottom in order to force the water flow to the center of the washer before leaving the washing chamber.

Hope it’s clear.

Alessandro

by alfa | 20 Dec 2007 15:12 | Torino, Italy | | Report spam→
Thanks Alessandro. I am viewing another system with water flow between the slots to use less water. I found a rare form of wash big prints, not with economy. See here

by Hernan Zenteno | 23 Dec 2007 17:12 | Buenos Aires, Argentina | | Report spam→
That bathtub washer is certainly interesting. Where does the hypo ladened water go? The trick isn’t so much agitation but to keep the prints separated and to drain out the bottom the hypo ladened water (hypo is heavier than water).

by John Robert Fulton Jr. | 24 Dec 2007 07:12 | Cambridge, United Kingdom | | Report spam→

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Participants

Hernan Zenteno, Photographer Hernan Zenteno
Photographer
Buenos Aires , Argentina ( EZE )
alfa, alfa
[undisclosed location].
John Robert Fulton Jr., Photographs John Robert Fulton Jr.
Photographs
Spring Lake, Michigan , United States


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