thiourea is a suspected carcinogen and should be labeled very clearly.
Be careful especially when mixing, wear gloves, mask, and goggles. Seriously.
I use a bleach / polysulfide toner / selenium method. All outside, works great.
Get Rudman's book, ease into it.
The main secret for me, is to really dilute the bleach to give me time
to keep the sepia from taking dmax away from the shadows. Experiment and
keep notes, each type of paper is different. Cut a print up into strips and differ
the times for each strip. This will explore the relationship between the brown
sepia and the purple selenium.
toner | sel
30 sec | 180 sec
60 sec | 120 sec
90 sec | 90 sec
120 sec | 60 sec
btw - according to "Photo Engineer", thiourea can fog film [not sure about paper].
Last edited by dasBlute; 01-14-2014 at 02:12 AM. Click to view previous post history.