Red & Far-Red Filters
gd3 at UMAIL.UMD.EDU
Tue Dec 2 10:33:42 EST 1997
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Rosco Laboratories seems to have moved. Check their web page (which I
have attached) for updated information on location and products.
Gerry Deitzer wrote:
> Red filters are relatively easy to come by, but remember that not all
> are the same. I use Roscolux #27 Medium Red celophane that I obtain
> locally from a theatrical supply company called Kinetic Artistry in
> Takoma Park, MD. Make sure that you use a fluorescent light source
> (cool-white is fine) since these are all cut-off filters and all
> transmit in the far-red. Do not use Incandescent bulbs !!
> Far-red filters are the real problem. The best filter is a Plexiglas
> filter that was made by Westlake Plastics in Lenni Mills, PA called
> FRF-700. Unfortunately, they no longer manufacture it and have no more
> in inventory. A suitable alternative is to combine the red filter
> described above with a blue filter (Roscolux # 385 - Royal Blue). In
> thism case you want to be sure that you have an adequate supply of
> far-red, which cool white does not. If you wish to match the red
> filter, use a wide spectrum gro-lux or vita-lite fluorescent source. If
> you want maximal far-red energy, use an incandescent source, but be
> careful of the amount of heat. You can very easily melt the celophane
> and start a fire.
> These filters can be obtained from Rosco Laboratories, Inc., 36 Bush
> Ave., Port Chester, NY 10573. Sorry, I don't have a phone or e-mail for
> them, but they might have a web site.
> Hope this was helpful.
> Gerald F. Deitzer
> Alex Enyedi wrote:
> > I am looking for the name of a supplier(s) of far-red and red filters
> > for use in my Plant Physiology class next semester. I have checked both
> > the Carolina and Wards catalog but nothing was available. If you can
> > help me out, I would appreciate it.
> > Thanks in advance.
> > Alexander Enyedi
> > Dept of Biological Sciences
> > Western Michigan University
> > Kalamazoo, MI 49008
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