Pyrocat HD: Different films in same tank

sanking · Apr 11, 2008

timeUnit said:
If you're using 1+9 dilution of the two solutions, I assume that the solutions are not used once and then discarded, as is the case with one-bath use of PyroHD? Correct? Is it safe to assume that the 1+9 solution has approx 10 times the capacity of the 1+1+100 one-bath solution?

The solutions can definitely be re-used, though I am not sure that the capacity is ten times that of the 1+1+100 dilution. Also, there is a question of time for working solution B since it begins to oxidize as soon as it comes in contact with the A in the film so I think it would be no good in a couple of hours. The A working solution lasts for some time, definitely over 24 hours, though I don't know how long beyond that.

Sorry, but quite a number of things I don't know yet for sure about two-bath Pyrocat.

Sandy

Stoo Batchelor · Apr 18, 2008

sanking said:
sanking said:

Sorry, but quite a number of things I don't know yet for sure about two-bath Pyrocat.

Sandy

Click to expand...

Hello Sandy

Just to revive this old thread. I watched it with great interest and was wondering if you have had anymore findings regarding two- bath Pyrocat that you could share with us all.

Kindest Regards

Stoo

sanking · Apr 18, 2008

Stoo Batchelor said:
Hello Sandy

Just to revive this old thread. I watched it with great interest and was wondering if you have had anymore findings regarding two- bath Pyrocat that you could share with us all.

Kindest Regards

Stoo

Hi Stoo,

Thanks for your interest. I don't have anything to add right now. However, I am working on an article on two-bath development for LF films, where scanning rather than darkroom printing is anticipated, and hope to include two-bath Pyrocat-HD in the study.

The only thing I can say for certian, in addition to earlier comments, is that it is much more consistent to use Pyrocat-HD as one shot rather than to try to re-use the developer. This has some issues from an economic perspective because we need such a strong dilution, 1:10. But Pyrocat-HD is very economical to mix so this may not be a major issue for some.

Sandy King

Stoo Batchelor · Apr 19, 2008

sanking said:
sanking said:

Hi Stoo,

Thanks for your interest. I don't have anything to add right now. However, I am working on an article on two-bath development for LF films, where scanning rather than darkroom printing is anticipated, and hope to include two-bath Pyrocat-HD in the study.

The only thing I can say for certian, in addition to earlier comments, is that it is much more consistent to use Pyrocat-HD as one shot rather than to try to re-use the developer. This has some issues from an economic perspective because we need such a strong dilution, 1:10. But Pyrocat-HD is very economical to mix so this may not be a major issue for some.

Sandy King

Click to expand...

Thank You for your reply Sandy. I have never been a fan of the re-use of chemicals anyway. And as you say, the developer costs pennies to make. Best of luck with your future testing.

Kind Regards

Stoo

Pyrocat HD: Different films in same tank

sanking

Stoo Batchelor

sanking

Stoo Batchelor

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