From: pete (temperaprint@blueyonder.co.uk)
Date: 04/09/02-07:15:42 AM Z
alnovo@inwind.it
> On 09/04/2002 12:29 Pete wrote:
>
>> I have used a 1% solution of sulphuric acid to clear my TempaPrints for the
>> past 15 years it clears as sweet as a bell no residual stain.
>
> Well, I have used in the past pot. bisulphite 5%, or sulphuric acid 1%, or
> sulphuric acid 0,5%+sodium sulphite 0,5% (this last clears in a few seconds),
> but if the stain is really heavy the chemical methods leave a greenish or
> bluish tone.
> So I prefer plain water and, if it reveals to be not sufficient, only at that
> poin I use the chemicals (the third one).
>
> Alberto
>
>
> http://spazioweb.inwind.it/albertonovo/index_eng.html
> http://www.grupponamias.com/novo/index_en.htm
>
This is most strange I have never found the sulphuric acid 1% not to clear
the brown stain back a neutral light grey . However I do use a plastic base
ie laminated polypropylene this may be the difference.
Pete
-- http://www.books.i12.com/parlour/index.html
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