[Alt-photo] masking edges

Kirk Lindgren klindgren2 at gmail.com
Wed Jun 14 02:26:57 UTC 2017

Try lithographers "rubylith tape".  This is what it is made for .

On Tue, Jun 13, 2017 at 3:16 PM, Mary via Alt-photo-process-list <
alt-photo-process-list at lists.altphotolist.org> wrote:

> Hi Bob and everyone,
> I have used the 3m blue painter’s tape successfully with gum prints with
> only rare damage to the paper. Things are usually fine if I follow the
> following step, which, IIRC, Paul Viapiano suggested a long time ago on
> this list:
> Press the sticky side of the tape on your jeans, sweater, or other piece
> of fuzzy clothing to moderate the stickiness before applying it to the
> paper. This is normally just enough to temper the stickiness and prevent
> tearing when you remove it. I press the back of my thumbnail along the
> inner edge to keep leaks away. If there are little bubbles of emulsion that
> leak around the edges, they can easily be removed during development with a
> fine brush. Of course, for cyanotype and Pt/Pd this doesn’t work!
> I try to remember to remove the tape by pulling at a right angle to the
> edge (but in the plane of the paper) instead of straight up. Not sure, but
> that seems to help prevent tears. Of both kinds.
> Also, I think there are a couple of different versions of the blue tape.
> The one I like says “original” for multi-surfaces and is supposed to be
> easily removable for 14 days. The number is #2090.
> Finally, I mostly use Fabriano Artistico paper but have not had good luck
> at all with this tape and this technique with HPR. Tears every time…..both
> kinds : (
> Cheers,
> Mary Donato
> www.alternative-ego.com <http://www.alternative-ego.com/>
> > On Jun 13, 2017, at 10:25 AM, Bob Cornelis via Alt-photo-process-list <
> alt-photo-process-list at lists.altphotolist.org> wrote:
> >
> > I'm interested in recommendations for the best way to mask edges to get a
> > clean, straight line. I'm mainly doing pt/pd and cyanotype.
> >
> > I'd prefer to not just extend the edge of the neg with black as sometimes
> > it's hard to get perfect clearing, especially with cyanotype. I know that
> > various tapes have come and gone over time so wondered if anyone has a
> good
> > source for a tape that doesn't mar papers (Platine and HPR) and doesn't
> > "leak" under the edge.
> >
> > Haven't tried rubylith but it seems expensive, sort of a pain to use and
> > not sure if it would have the same problem with clearing highlights.
> >
> > Thanks!
> > Bob
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