Keith_Gerling (kgerling@ameritech.net)
Tue, 16 Mar 1999 07:53:51 -0600
I've been struggling with the registration of digital negatives for some
time now. While I've never been off by 3mm (you don't specify the size of
the print, but 3mm would be significant at any size) I have experienced some
wide discrepancies. Some of my own discoveries:
1. Waxing the negatives seems to provide more in the way of a consistent
result. Occasionally, when I was oiling paper negatives, the paper actually
swelled. My paper negatives would not even register with themselves, much
less the gum print. (A trick that worked with a swollen oiled negative was
to place it in a hot dry mount press for a few seconds.)
2. Am I understanding this correctly: you register BEFORE you coat? I
would be very nervous about doing this. It would seem that extra
opportunity for error could be introduced. I always coat, dry and THEN
register. I've spent up to twenty minutes hassling with a ornery negative
on a light table, and have never experienced any kind of fogging.
3. Maybe it'd just the climate here in the hinterlands of Illinois, but I
find that I have the most problems with registration when I don't complete a
print in a single day. I try to keep the negatives and the print in the
same room (usually my darkroom, which is more humid) and complete the
process as quickly as possible. I have far more problems when the gum print
dries to a brittle state.
> -----Original Message-----
> From: Adam Kimball [mailto:akimball@finebrand.com]
> Sent: Monday, March 15, 1999 2:13 PM
> To: alt-photo-process-l@sask.usask.ca
> Subject: Registering Paper Negs
>
>
> Can anyone tell me why I am having so much trouble re-registering my paper
> negs for gum prints? I can't understand it. I've preshrunk as I
> normally did
> for analog negs. I register before coating on a light table, and very
> securely tape the negative into place. I simply don't understand it. It
> isn't that my registrations are off by a hair- they can be 3mm
> off or more!
>
> My method is such: in creating a digital neg, I make four fairly big plus
> marks that are placed outside the image area and in the middle. Like..
>
> +
> |-------|
> +| | +
> |-------|
> +
>
> (the interior is the image, the horizontal and vertical lines are
> the print
> edges.) This will look like a garbled mess to those of you who
> aren't using
> fix width fonts)
>
> That way I am trying to align from the center.
>
> What could be happening?
>
> Thanks,
> Adam
>
>
This archive was generated by hypermail 2.0b3 on Sat Nov 06 1999 - 10:09:03