Age of ferric oxalate in Pt/Pd printing
TERRY KING (KINGNAPOLEONPHOTO@compuserve.com)
Thu, 27 Nov 1997 02:25:45 -0500
Message text written by Stephen R Harrison
>1) Is there any difference between freshly mixed ferric oxalate and for
example three week old ferric oxalate ?
2) Is it recommended to mix fresh ferric oxalate each printing session?
3) Does refridgeration of the mixed #1 solution after printing slow down
the aging process.
4) How about the aging of #2 solution: ferric oxalate and potassium
chlorate and the need to mix the solution fresh each printing session?
Thanks in advance<
Stephen
On the basis of my home made Ferric Oxalate, it loses about half a stop
after a year so there is no need to make it fresh each time or refrigerate
it.
I never use the potassium chlorate (No 2) as I believe that you get better
prints if you get the neg right first.
Terry