Re: report on cynotype and acid and a chemistry question.

Tom, I used 20ml of ferric ammonium citrate solution,
10ml of potassium ferric cyanide and 5 ml of citric
acid.
I diluted 40 grams of citric acid in 100ml of
distilled water.

Carmen

--- "T. E. Andersen" <postlister@microscopica.com>
wrote:

> Hello Carmen,
>
> Thank you for the information on using citric acid
> in the cyanotype
> sensitizer.
> The information you give about your recipe puzzles
> me a bit. Could you
> please post your actual recipe? The one I've always
> used, as well as all
> other that I have checked, use a 1:1 ratio of the
> two component
> solutions. This implies that you may have a
> significantly different
> recipe from what I'm used to.
>
> Also,- when you say 25% citric acid, what do you
> mean? Is it 25% of the
> total volume? 25% by weight of citric acid in the
> final solution?
>
> Thanks again, and have a fine day!
>
> Best regards,
> Tom Einar Andersen
>
>
>
> Carmen Lizardo wrote:
> > I used the classic formula, mixed 2a: 1b and added
> 25
> > percent of citric acid (Of a 40 percent solution
> of
> > citric acid mixed with distilled water).
>

                
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Received on Tue Oct 25 16:33:18 2005