acid bath for cyanotype

[sstoney@pdq.net (shannon stoney)]

Judy wrote:

>However, I did not compare the effect of the acid precoat to simple double
>coating, and/or an acid bath as first wash, which is said to intensify
>cyanotype.

I tried the acid bath for the first wash with cyanotype, and it did
intensify it, but it sort of worried me, because so much blue came out into
the bath. It seemed as if it was washing away a lot of the prussian blue.
So I stopped doing it.  Instead I give the last bath a shot of acid.

--shannon