[alt-photo] Re: Paper Negatives

[joachim oppenheimer]

-----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
Laura V
Sent: Monday, February 22, 2010 5:21 PM
To: The alternative photographic processes mailing list
Subject: [alt-photo] Re: Paper Negatives

What exactly is it about non-distilled water that we want to avoid? I'm 
trying to figure out if Icelandic tap water is just as good. It has no 
additives, like chlorine or fluoride. The water from the waterworks in 
Reykjavik has the following makeup:

PH Value : 8,9 / 25 (measured at 25ºC)
Na+ mg/l: 10,70
Ca++ mg/l: 3,80
Mg++: 1,01
Cl-  mg/l :  10,3
HCO3- mg/l  : 24,5
SiO2 mg/l : 13,10
SO4-- mg/l:  3,10
Minerals mg/l : 68

 From googlling, I guess that distilled water has no minerals at all. Or 
is it the biological impurities that need to be distilled out?

Any thoughts?

Regards,
Laura

> POLY VINYL ACETATE (PVA) SIZE
> Diluted with distilled water, 
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