[alt-photo] Re: pre-shrinking paper

[Dave S]

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             
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