[pure-silver] Re: DS14 paper developer and a slimy mold
- From: Ryuji Suzuki <rs@xxxxxxxxxxxxxxx>
- To: pure-silver@xxxxxxxxxxxxx
- Date: Mon, 10 Apr 2006 05:02:33 -0400 (EDT)
It's not necessary to disinfect the tank to your standard, nor worry
about spores from water supply, as long as the water is safe to
drink. Spores can come from the air and also the paper. Paper
manufacturers add biocide to the emulsion, but they do not necessarily
add disinfecting quantity of such compounds.
Unless there's some nutrients, bacterial may be present but they can't
grow too much and they don't present problems in photographic
processing. Water supply containing calcium or magnesium is easier to
grow bacterial when a small amount of gelatin debris is
introduced. Either way, the main factor is removal of nutrients
(gelatin). It is also much more effective to attack bacterias and
molds before they grow to increase cell counts.
One common place where bacterial growth is most problematic is the
washing tank of minilab machines. Washing water is recycled. Minilab
manufacturers often specify to use demineralized water, and add
isothiazolinone and/or phenol-derived biocides to the washing water.
From: "Edward C. Zimmermann" <edz@xxxxxxx>
Subject: [pure-silver] Re: DS14 paper developer and a slimy mold
Date: Mon, 10 Apr 2006 10:42:39 +0200
> Use filtred and boiled water or Aqua Dest. Before, however, changing over the
> water source you must throughly clean the Nova.
>
> The slimmy stuff is bacteria growth. Since the Nova can withstand the use of
> Clorine bleach I'd use 1:9 or 1:10 of "household" clorine bleach (as sold in
> supermarkets) and let it soak for 1/2 hour or so. Following the use of the
> bleach you need to rinse, rinse, rinse, rinse as its a bleach and you don't
> want any to mess with your prints.
>
> You may have spores in your water supply and tank and to tackle this you want
> to
> use some anti-algae and sporacide compounds. They are available from multi
> sources including home and garden as well as photographic and offset printing
> industry suppliers. I use some products from Shamrock in Holland.
>
> Quoting "Breukel, C. (HKG)" <C.Breukel@xxxxxxx>:
>
> > Hi,
> >
> > The last 2 years I have been very happy with the DS14 paper developer,
> > designed by Ryuji Suzuki. In combination with the replenisher it works
> > like a charm in my Nova tank, with a working live upto 6 months.
> >
> > Yesterday I lifted off the lid of the Nova tank to dicover that a nasty
> > slimy mold/fungus had formed in the developer. It still worked though,
> > but it is not optimal, to say the least...
> >
> > So what compound could I add to the developer to prevent this growth?
> > Obviously the compound shouldn't interfere with the developer
> > characteristics such as pH etc.
> >
> > Thanks in advance!
> >
> > Best,
> >
> > Cor
> > To unsubscribe from this list, go to www.freelists.org and logon to your
> > account (the same e-mail address and password you set-up when you
> > subscribed,) and unsubscribe from there.
> >
> >
>
>
> --
> --
> Edward C. Zimmermann, Basis Systeme netzwerk, Munich
> =============================================================================================================
> To unsubscribe from this list, go to www.freelists.org and logon to your
> account (the same e-mail address and password you set-up when you
> subscribed,) and unsubscribe from there.
>
=============================================================================================================
To unsubscribe from this list, go to www.freelists.org and logon to your
account (the same e-mail address and password you set-up when you subscribed,)
and unsubscribe from there.
Other related posts:
