From: Judy Seigel (jseigel@panix.com)
Date: 09/24/01-11:33:03 PM Z
On Mon, 24 Sep 2001, shannon stoney wrote:
> My experience this summer was that the black light (BLB) bulbs that
> are blue take about seven minutes to expose a "normal" cyanotype
> negative. Regular flourescents, even after an hour, still had not
> exposed the print enough to get anywhere close to Blue Max.
>
The BLB bulbs are "black light blue" and look blue when lit. They block
all but that wavelength & so are slower than the "black light" or BL
bulbs.
Judy
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