[alt-photo] Re: pre-shrinking paper

[Erich Camerling]

Yes Dave,
Thank you very much for your help.
Erich

Dave S schreef:
> 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
>>
>>     
>
>
> _______________________________________________
> Alt-photo-process-list | http://altphotolist.org/listinfo
>
>