From: Manuel Gomes Teixeira (punctumgt@netvisao.pt)
Date: 04/10/03-11:50:04 AM Z
Kerik,
Thank very much indeed for the precious help you are providing to me.
Your information will be vital for a correct volume order I will complete
today from B&S.
My last question:
What is the shelf life of NA2 solution ?
Thanks again for your time. :-)
Kindest regards
> From: Kerik <Kerik@kerik.com>
> Reply-To: alt-photo-process-l@sask.usask.ca
> Date: Thu, 10 Apr 2003 10:18:47 -0700
> To: alt-photo-process-l@sask.usask.ca
> Subject: Re: hp and pot di with pt/pd
>
> Manuel,
>
> Two drops of the standard Na2 solution (20%) would give a *radical*
> increase in contrast. This stuff is very powerful. I suggest you dilute
> some of your Na2 with distilled water into 10% and 5% batches, then do some
> experiments adding just one drop to your normal sensitizer mix and see what
> you get at each concentration level. You don't need to substitute from your
> standard mix, just add a drop of Na2.
>
> Kerik
>
>
>> And with Na2 , do you use it as direct substitute for K2ptCl4 ?
>>
>> For example
>>
>> 9 drops FeOx
>> 1 " Pt 2 " Na2
>> 6 " Pd
>> to increase contrast , instead of
>>
>> 9 drops FeOx
>> 3 " Pt
>> 6 " Pd
>
>
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