Digital BW, The Print

Test (10g/litre) with bicarbonate de sodium.

a+

Le 19/09/2018 � 04:27, Paul Roark roark.paul@... 
[DigitalBlackandWhiteThePrint] a �crit�:
> I have heard of two other cases of biological activity in the generic 
> clear base I use, but that's it -- from all over the world.� I 
> strongly suspect it is contaminants, most likely in the distilled 
> water.� Be sure that the glycerol is the 99.7% purity glycerol to 
> start with.� See my footnote 9 at 
> http://www.paulroark.com/BW-Info/Ink-Mixing..pdf 
> <http://www.paulroark.com/BW-Info/Ink-Mixing.pdf> for what I recommend 
> and have used for years with never any sign of biological activity.� 
> Note that I do store the chemicals in my "darkroom," but I have two 
> small windows that let in some north light, only covering them when I 
> process film, which is past history.� I might also add, relating to 
> the water, that while a use store-bought distilled water (not just 
> "purified" water), a chemist I consulted with did not trust store 
> bought distilled water.� She felt the "double-distilled" water was the 
> best.
>
> Paul
> www.PaulRoark.com <http://www.PaulRoark.com>
>
> On Tue, Sep 18, 2018 at 4:52 PM Sean M Puckett seanmpuckett@... 
> <mailto:seanmpuckett@...> [DigitalBlackandWhiteThePrint] 
> <DigitalBlackandWhiteThePrint@yahoogroups.com 
> <mailto:DigitalBlackandWhiteThePrint@yahoogroups.com>> wrote:
>
>     Hi,
>
>     I\u2019ve been mixing my own inks for a few years, generally with
>     distilled water, PhotoFlo and glycerine (plus a full strength
>     pigment in the appropriate ratio). Problem I have is mold growth.
>     Glycerine is edible, especially when diluted, and without
>     something to suppress growth, I get cruft in my ink tanks and
>     probably up in my printheads. Usually I can blow it out with
>     patience but I\u2019d rather just have something that doesn\u2019t support life.
>
>     Any thoughts on either an additive or replacement for glycerine to
>     get the right viscosity? I\u2019m otherwise very happy with the results.
>
>     Thanks.
>
>     -s
>
> 
-- 
*Daniel Andron
https://leicameter87.deviantart.com/
T�l: 09 50 53 14 00
*