From: Sandy King (sanking@clemson.edu)
Date: 04/29/03-09:53:00 AM Z
Carl,
Because a lower percentage of solution is lost to the brush as you
increase in size I don't extrapolate up linearly. For example, for a
12X20" print I use only 8ml of sensitizer, and the 20X24 gets 14ml.
These amounts work well for me and there is not a lot of money
involved in the silver nitrate and ferric oxalate so cost here is
definitely not an issue.
I had suspected that for cost considerations Pt/Pd printers attempt
to use the minimum amount of sensitizer necessary and that this
*might* be the reason you had problems with streaking. Of course, it
could be other issues such as temperature and humidity, or just
difference in coating technique.
Sandy
> > My technique
>> is to use a lot of sensitizer, about 1.5ml for a 5X7 print
>
>
>OK, that's a lot. For a 5x7 Pt/Pd I use 6-7 drops of each solution, so
>that's significantly less than one ml total. Extrapolate that up to 20x24
>and it must be like pouring a bottle of Coke onto the paper!
>
>---Carl
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