Re: drying cyanotype: LS

Larry Bullis ( lbullis@ctc.ctc.edu)
Sun, 05 January 1997 9:24 PM

Judy et al:

I coat a very heavy waterleaf paper with cyanotype solution which
saturates the paper right through, just like a wet blotter.
Consequently, drying is a critical issue for me. I devised a dryer
consisting of a box with a glass side, in which I hang the paper. Fans
reduce the pressure inside the box (there are three computer type muffin
fans in the top and an inadequate number of holes in the bottom to allow
free flow of air), and I use infrared heat lamps shining in the window.
I don't know about the physics for sure but I checked the theory out with
a scientist at the US gov't infrared lab in Hawaii; all he cautioned
about was dust on the glass which could cause microscopic hot spots which
could possibly break the glass. Subsequently, I learned that Floyd Lee,
our old time local dye - transfer genius used to use negative pressure
cabinets to dry his materials with excellent results.

This method has worked very well for me. Prior to building this box, I
think I can recall some trouble with uneven prints when using heat to dry
the paper.

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