hp and pot di with pt/pd

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From: Christina Z. Anderson (zphoto@montana.net)
Date: 05/09/03-08:51:44 AM Z

Good morning!
     Does anyone use either hydrogen peroxide or potassium dichromate added
to the developer or hp added to the sensitizer (the latter not for
palladium)?
     Correct me if I am wrong here: added to the developer, dichromate will
increase contrast? And hp will decrease contrast? Why does this happen?
Chris

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