RE: Sorry to beat a dying horse, but more questions on lighting and Cyanotypes...

Alex,
Are you sure that you read the articles well? I guess you will have
exposure times around 8 - 12 hours with these bulbs. You have to use BL
tubes (or Philips '05 Actinic tubes if you're in Europe), with these
bulbs placed 5cm (2") above the printing frame glass (1cm between each
bulb is enough to provide an even illumination, 8 bulbs is enough to
cover 60x40cm ~ 24x16") you will experience around 6 - 12 minutes
exposure times (former: new cyanotype, latter: double coated classic
cyanotype).
Regards,
Loris.

> -----Original Message-----
> From: Alex Swain [mailto:fotoobscura@gmail.com]
> Sent: Thursday, December 16, 2004 4:07 PM
> To: alt-photo-process-l@sask.usask.ca
> Subject: Sorry to beat a dying horse, but more questions on
> lighting and Cyanotypes...
>
>
> I have read a bunch of stuff about lighting Cyanos...Mercury
> Vapor, Sodium Halide (?), Blacklights, etc on unblinkingeye,
> other places...
>
> I have some "full spectrum" 48" fluorescent bulbs that
> purportedly have a color temperature of around ~5000K. I
> have used them in the past for digital product photography
> (which have worked great) and was
> wondering if I can reuse them for cyanos. These are GE bulbs from
> Home Depot, nothing special. I also have much more expensive
> 5500K (again, purportedly) fluorescent screw-in type bulbs
> which I can also use except they won't be as "even" and will
> basically require a "rack" of them to light the area (i'm
> doing 8x10's and bigger)
>
>
> Thanks!
>
>
> --
> Cheers,
> Alex Swain (fo)
> http://www.zoom.sh
>
Received on Thu Dec 16 08:25:24 2004