Re: pigment

From: Katharine Thayer ^lt;[email protected]>
Date: 11/21/05-10:49:46 PM Z
Message-id: <>

On Nov 21, 2005, at 6:55 PM, Dave Rose wrote:

> Isn't Prussian Blue the same pigment/chemical that forms cyanotype
> prints?

Is it? I guess I've never heard or thought about what the final product
is that forms a cyanotype print, but Prussian blue is hydrous ferric
ferrocyanide or feriammonium ferrocyanide, is that what it is?

To my eye, Prussian blue pigment has a greener cast to it than most
cyanotypes I've seen, or than pthalo, which to my eye has probably the
purest cyan hue for tricolor of the blue pigments available, followed
by ultramarine. And to me it's a duller blue than either pthalo or
ultramarine, and for those two reasons I didn't suggest it for
tricolor. But I can't say for sure that it's not good for tricolor,
because I've never tried it. I guess I was also influenced by someone
who wrote the other day that he had tried Prussian for tricolor and it
didn't work well at all.

I feel another test
Received on Mon Nov 21 22:50:34 2005

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