donnay thierry (thierry.donnay@skynet.be)
Tue, 09 Nov 1999 14:09:48 +0100
> Interestingly enough, they say that they use a high-powered UV enlarger,
> instead of using intermediate contact negatives. I wonder how will all
that
> UV light affect your color slide. If I were you, I'd send a duplicate...
Some interesting news for the gum-printers or carbo-printers. Dichromate is
sensitive enought to work with a slide projector. No need to use
intermediate contacts negatives if you're doing "small format" (I mean A4
maximum) : 20 minutes exposure for a well contrasted 24/36 negative.
But I have to confess that I heard about this 'discovery' a few weeks ago
and that I only did tests. I can't produce a perfect result at this moment,
but it's working perfectly. Only disadvantage : long long exposure time. But
I'am now customising my slide projector and putting an UV lamp into it
(Philips HP 125w).... I hope it will reduce the time of the exposure.
Bye,
Thierry from belgium
Alt-photo site :
http://www.photogramme.org
egg prints :
http://www.photogramme.org/textes/gal_th_oeuf1.htm
gum prints :
http://www.photogramme.org/textes/gal_th_gomme1.htm
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