[pure-silver] Re: Five year old paper?
- From: "Koch, Gerald" <gkoch02@xxxxxxxxxx>
- To: <pure-silver@xxxxxxxxxxxxx>
- Date: Tue, 8 Nov 2005 08:56:05 -0500
I have been told that benzotriazole causes less loss in paper speed than
potassium bromide when used in an amount to cause the same fog suppression.
There is no reason why both cannot be used together to obtain a more neutral
image tone. In fact this is what I do routinely since I want pure neutral
blacks and am uninterested in brown tones.
-----Original Message-----
From: pure-silver-bounce@xxxxxxxxxxxxx
[mailto:pure-silver-bounce@xxxxxxxxxxxxx] On Behalf Of Philippe Gauthier
Sent: Tuesday, November 08, 2005 12:48 AM
To: pure-silver@xxxxxxxxxxxxx
Subject: [pure-silver] Re: Five year old paper?
Richard Knoppow a écrit :
>
> For Potassium bromide I would test with the equivalent of about 5
> grams per liter in the _stock_ solution. Dektol and similar developers
> have around 2 grams per liter as they come. One can increase the
> amount in the stock to as much as 20 grams per liter although
> development time will be slowed. I give the equivalent for stock since
> I don't know how much you dilute.
>
> Benzotriazole will tend to shift the paper color toward blue,
> Bromide toward yellow or brown.
Thanks, I'll try to add 2 to 8 grams of KBr per liter in the final
solution if the need arises. I usually prefer warm to cool prints, but I
think that I should stock on Benzotriazole, I can thank of a few
instances where a blueish tone would be welcome.
PG
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