Direct positive paper, what's the science behind it?

carioca

Member
Joined
Nov 16, 2005
Messages
114
Location
Paris
Format
Multi Format
Out of curiosity, I have always wondered what the science behind direct positive paper is, ex. Harman direct positive paper.
Is there any photo chemist or knowledgeabled member here, that could roughly shed some light on how this process is achieved?
Thanks
 
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