[alt-photo] Re: Sulfite + Na4.EDTA clearing bath quick kitchen formula?

[Loris Medici]

Same here...

OTOH, I'm not sure I'd like to include citric acid into Na4.EDTA; I
already do process in citric acid first, and would prefer to leave the
paper in a neutral/alkali condition for best possible longevity.
Still, I may use it as the first clearing bath and then do another
clearing run w/o the citric acid, in case of stubborn papers that
won't clear the first time...

Thanks again,
Loris.


24 Şubat 2012 19:57 tarihinde Keith Schreiber <keith at jkschreiber.com> yazdı:
> Hi Philippe,
>
> Not that I know of. It's just that over here in the states the tetra-sodium form is easily available. Not so much with the di-sodium form.
>
> ~ Keith
>
>
> On Feb 24, 2012, at 10:00 AM, Philippe Ayral wrote:
>
>> 2012/2/24 Keith Schreiber <keith at jkschreiber.com>:
>>> Hi Loris,
>>>
>>> because the citric acid converts the tetrasodium edta into the disodium form, so be sure they are dissolved fully before adding the sulfite.
>>>
>>> Keith
>>>
>>
>> So any reason not to use directly the di-sodium form ?
>>
>> --
>> Philippe Ayral
>> 52, rue de Vallard - 74240 Gaillard
>> Tél. 04 50 39 79 81
>> http://payral.pagesperso-orange.fr
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