RE: Cyanotypes

Colin -

Actually, the process isn't difficult to control as long as you control the
variables that affect exposure. Exposing with the sun will give you the least
repeatable experience possible because the variables can be so wide. A UV box
will take care of that. Also, your choice of paper, whether you single or
double coat, which formula you use, the density of your negative, and other
things can affect your results. It's just like using photo paper in the
darkroom - remove the variables, test, and you'll find that you can depend upon
getting the results you want.

Cheers -

george

--- Colin Talcroft <ctalcroft@yahoo.com> wrote:

> Sorry,
>
> I didn't mean to turn this into the cyanotype forum,
> but it's been so dead lately that I didn't think I'd
> be stealing bandwidth, and I knew some of the pinhole
> people would know about this. Kate mentioned 45
> minutes as an exposure time. I was already surprised
> because of the "overexposure" effect (not fogging) of
> my first attempts with a 4-minute exposure. I have
> subsequently done one more successfully with only a
> two-minute exposure. Hmmmm. And again, my main
> surprise was that the blue kept getting darker for a
> day or two after exposure. Sounds like a difficult
> process to control. I guess it's time to hit the
> books. I was just experimenting with a little kit made
> for kids called "The Sunlight Print." Maybe it's
> designed to be very sensitive so the kids don't have
> to wait? Anyway, thanks for the thoughts...
>
> Colin
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Received on Sun Nov 5 14:44:57 2006