[alt-photo] Re: pre-shrinking paper

[Keith Gerling]

funny, Dave, but on my screen his are aligned better that yours

On Fri, Jan 22, 2010 at 10:40 AM, Dave S <fotodave at dsoemarko.us> wrote:

> I think you probably used tabs? I tried it with spaces and it seems to
> work. I
> believe this is what you intended to show:
>
>                        width         height        diagonal
> 1x preshrink            + 0,05 %      - 0,47 %      - 0,15 %
> 1x  sizing              - 0,26 %      - 0,57 %      - 0,53 %
> 1x pre + 2x  sizing     - 0,54 %      - 0,76 %      - 0,77 %
>
>
> Dave S
>
> > -----Original Message-----
> > From: alt-photo-process-list-bounces at lists.altphotolist.org
> > [mailto:alt-photo-process-list-bounces at lists.altphotolist.org]
> >  On Behalf Of Erich Camerling
> > Sent: Friday, January 22, 2010 10:25 AM
> > To: alt-photo-process- list
> > Subject: [alt-photo] pre-shrinking paper
> >
> > Dear members,
> >  From my own measurements with ARCHES PLATINE  I know that
> > pre-shrinking has a little effect compared to sizing with gelatine.
> >
> > width                          height                      diagonal
> >                  1x preshrink            + 0,05 %
> >        -
> > 0,47 %                    - 0,15 %
> >                  1x  sizing                 -  0,26 %
> >
> > - 0,57 %                    - 0,53 %
> >    1x pre + 2x  sizing                 - 0,54 %                     -
> > 0,76 %                    - 0,77 %
> > How did I do this measurements :
> > I took 5 sheets of brand new ("virgin") Arches Platine (19 x 28 cm)
> > (~7,5 x 9,8 inch.(For members who still love that archaic unit)).
> > In every corner of every sheet I put a little hole with a
> > pin.To easily find again that little hole after every
> > treatment I drew a small circle around every hole with a
> > pencil.Then I measured very precise all the distances in
> > every sheet (4x along the edges : left,right,above, under ;
> > 2x diagonal ).
> > I gave three sheets a preshrink (60 min. 50 deg.C) .(Archaic : 122 deg
> > F.) ,dried these sheets and measured the distances again (P).
> > I sized two sheets from these three sheets,dried them  and
> > measured again (P + S).
> > One sheet from these two sheets I sized again etc.  (P + 2x S).
> > I sized the two remaining "virgin" sheets,dried them etc. (S).
> > And one of these sheets I sized again etc.  (2x S) .
> > After comparing the results my conclusion was : sizing gives
> > the highest shrink in this (=my) situation.
> > Everyone can do this test for her (his) own paper.  Maybe you
> > come to comparable results and then you can stop preshrinking.
> > That will save a lot of time for the future.
> > Kind regards ,
> > Erich
> > _______________________________________________
> > Alt-photo-process-list | http://altphotolist.org/listinfo
> >
>
>
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