Washing RA-4 papers @ < 35ºC

Tom Kershaw · Jun 22, 2010

Has anyone here done testing or have prior knowledge on washing RA-4 paper at less than 35 or 30 degrees centigrade? - A pdf for a room temperature kit on www.novadarkroom.com suggests 4 minutes @ 18ºC.

Tom

Photo Engineer · Jun 22, 2010

Four minutes at 18C is much too low of a temp and much too short of a time.

I would not go below 20 deg C and I would use enough time for the paper to test free of retained hypo and retained silver using the standard tests. I myself hold batches of 20 - 40 prints (8x10 or 11x14) in trays at up to 85 F for 1/2 hour or more during a session and then I give them a final running water wash for about 2 - 4 minutes at 85F.

PE

Tom Kershaw · Jun 22, 2010

Photo Engineer said:
Four minutes at 18C is much too low of a temp and much too short of a time.

I would not go below 20 deg C and I would use enough time for the paper to test free of retained hypo and retained silver using the standard tests. I myself hold batches of 20 - 40 prints (8x10 or 11x14) in trays at up to 85 F for 1/2 hour or more during a session and then I give them a final running water wash for about 2 - 4 minutes at 85F.

PE

PE,

I was surprised when I saw that suggestion, i.e. the 4 minute wash.

Tom

Washing RA-4 papers @ < 35ºC

Tom Kershaw

Photo Engineer

Tom Kershaw

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