Carol,

The answer depends on the purpose of the curtains.

Blackout material from Thorlabs will block light, but IS REALLY NOT intended to
handle a laser beam, expecially one from a Class 4 laser which has femtosecond
pulses.  Burning plastic is not healthy!

Kentek, Rockwell Laser Industries, and other laser safety suppliers sell
curtains and panels which can handle a Class 4 laser beams.  Some suppliers
offer different colours.

If safety rules must be adhered to, call the safety companies.  I heard of
people using gyprock (sp?) to block laser beam, but it not the intended
purpose.

Good luck,
Sophie

P.S.: no financial gain with companies mentioned above.
____________________________________________________
Sophie M. K. Brunet, Ph. D.
Research Officer
Optical Spectroscopy, Laser Systems and Applications
Chemistry 112 sessional lecturer
[log in to unmask]
306-966-1719 (office)   306-966-1702 (fax)
____________________________________________________
Saskatchewan Structural Sciences Centre
University of Saskatchewan
Thorvaldson Bldg.
110 Science Place
Saskatoon, Sk   S7N 5C9
____________________________________________________


Quoting Carol Bayles <[log in to unmask]>:

> We are moving our multiphoton system into temporary quarters and need
> a temporary light barrier for our space.  Does anyone know of a
> source for black fireproof fabric that we can buy by the yard and
> just hang ourselves?  I found lots of fancy curtains and free
> standing barriers on the web, but we would prefer to just buy fabric
> by the yard.
>
> thanks,
> Carol
> --
> <><><><><><><><><><><><><><><><><><><><><>
> Carol Bayles, Manager
> Microscopy & Imaging Facility (MIF)
> Life Sciences Core Lab Center
> 160a Biotech Bldg
> 607-254-4860
> 607-254-6379 fax
> http://cores.lifesciences.cornell.edu
>
> Confocal and Multiphoton Microscopy
> Nanobiotechnology Center
> www.nbtc.cornell.edu
>
> Cornell University
> Ithaca NY 14853
>