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Re: Dimensional stability of paper negatives?
Dave Rose wrote:
>
> *****************
>
> I have no experience with paper negatives, but I'm guessing that a big
> problem with them would be dimensional instability due to changes in
> relative humidity. I can envision this phenomenon being especially
> troublesome with large negatives and multiple printing, e.g. making gum
> dichromate prints. It's bad enough dealing with the print itself shrinking
> and expanding as humidity fluctuates!
>
Sorry for being way behind but I'm just now making my way through
hundreds of messages that piled up while I was offline for a while
earlier in the year.
As to the dimensional instability of paper negatives, I don't see that
as a potential problem unless the paper negatives were used without
treating with wax or oil to increase transparency. It seems unlikely to
me that paper impregnated with wax or oil will be absorbing any amount
of water to worry about, and I can cite my own experience of achieving
quite adequate registration with large paper negatives containing small
details (for example those flocks of birds I've described elsewhere).
Katharine Thayer