Re: Dichromated Gelatin Emulsions

Sandy wrote:
>The addition of these substances does not appear to have any
affect on the working qualities of the tissue, i.e. they do not "help the
portions of the emulsion that weren't hardened dissolve or 'develop' more
readily." as Judy suggests, nor do they impact in any appreciable way the
sensitivity and contrast of the tissue. <

I remember that I experienced a significant increase in contrast when
glycerin was added to the sensitizer (which was necessary to keep the
Hanfstaengl color emulsions coated on plastic from drying out and rolling
prior to exposure.)
Klaus
Received on Thu Dec 7 07:24:24 2000