spectral sensitivity of platinum/palladium and cyanotype coatings.

Most of us use UV for the iron processes such as cyanotype and
platinum/palladium.
 
Herschel established in 1842 that UV is not necessary for cyanotype and
Michael Maunder has recently conducted tests to confirm this. In an Il Laborario
meeting recently, David Harris suggested using green inks rather than red for
making negatives on Translucent II. This seemed to work very well for
platimum/palladium solutions. What do people consider the implications of this to
be for the spectral sensitivity of platinum/palladium ?
 
Terry
 
Terry King FRPS

RPS Historical Group (Chairman)

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Received on Tue Feb 21 03:52:57 2006