Re: pigment

P.S. Another thing about Prussian blue is that, as I've noticed in the
brand I use (M. Graham) and reportedly in Daniel Smith as well (McEvoy)
, the very fine pigment particles tend to clump or settle into what
looks like little flecks or speckles in the pigment, giving it a grainy
effect. I like this effect very much in monochrome, but I don't think
I'd like it much in a tricolor.
kt

On Nov 21, 2005, at 8:49 PM, Katharine Thayer wrote:

>
>
>
> 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
> kt
>
Received on Mon Nov 21 23:04:24 2005