[pure-silver] Re: Selenium toning + Agfa Sistan

Thanks, guess I could do that too. So far, I've been using coffee 
filters -- new ones of course ;-)

Regards -
Malcolm Brickwood


On Nov 26, 2004, at 1:25 PM, DarkroomMagic wrote:

> I squeeze it off, just like wash water.
>
>
>
>
>
> Regards
>
>
>
> Ralph W. Lambrecht
>
>
>
>
> On 11/26/04 5:14 AM, "Malcolm & Sylvia Brickwood"
> <m_s.brickwood@xxxxxxxxxxx> wrote:
>
>> When using Sistan, I'm never quite sure what the proper technique for
>> wiping off excess is. What's the recommended procedure? Sponge, coffee
>> filter, shake???
>>
>> Thanks -
>> Malcolm
>>
>>
>> On Nov 25, 2004, at 7:26 PM, Richard Knoppow wrote:
>>
>>>
>>> ----- Original Message -----
>>> From: "DarkroomMagic" <info@xxxxxxxxxxxxxxxx>
>>> To: "PureSilverNew" <pure-silver@xxxxxxxxxxxxx>
>>> Sent: Thursday, November 25, 2004 4:11 PM
>>> Subject: [pure-silver] Re: Selenium toning + Agfa Sistan
>>>
>>>
>>>> We may never get the complete story (Agfa doesn't have a
>>>> research staff
>>>> anymore either), but they are talking about Sistan working
>>>> on silver salts
>>>> produced through oxidation in the print's future.
>>>> Remember, Sistan is
>>>> applied to the print and should not be washed out
>>>> afterwards. It is staying
>>>> in the print to work on future silver oxidations, turning
>>>> them into
>>>> insoluble silver compounds. The text says that these
>>>> compounds build the
>>>> protective layer at that time.
>>>>
>>>> Selenium and KBT will protect the silver from this
>>>> oxidation by forming mor=
>>>> e
>>>> stable silver selenide and silver sulfide, respectively.
>>>> Hence, Sistan has
>>>> nothing to do work on in a fully toned print. However,
>>>> these toner
>>>> conversions are never 100%, and that's why I like the
>>>> Sistan treatment in
>>>> addition to toning.
>>>>
>>>> IMHO, Sistan is not a replacement for toning as this
>>>> brochure promotes. The=
>>>> n
>>>> again, using Sistan without prior toning is better than
>>>> using no print
>>>> protection at all. However, there are arguments that
>>>> Sistan might not be
>>>> needed if the print has been toned. I just like to be
>>>> sure, and Sistan
>>>> cannot hurt as a final treatment, if its residue is wiped
>>>> off.
>>>>
>>>>
>>>>
>>>>
>>>> Regards
>>>>
>>>>
>>>>
>>>> Ralph W. Lambrecht
>>>>

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