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Posted on Friday, January 02, 2004 - 09:53 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only) Ban Poster IP (Moderator/Admin only)

through two years's studying, i found out a new kind of physical developer,which can developer effectively latent fingerprints on porous and non-porous surfaces ,and produces no background on papers and particular papers such as thermal papers ,but i do not understand "why does my new physical developer develop yellow ridges" .
who would help me ?

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