Red & Far-Red Filters

Gerry Deitzer gd3 at UMAIL.UMD.EDU
Tue Dec 2 10:33:42 EST 1997

This is a multi-part message in MIME format.

Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit


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

Content-Type: text/html; charset=us-ascii
Content-Transfer-Encoding: 7bit
Content-Base: ""


<title>Rosco Laboratories Inc.</title>
<body bgcolor="#000033" text="#ffff00" link="#00ff00">
<center><img src="logo.gif"><BR>
<img src="innovative.gif"></center>

We are currently updating and re-designing our website.<BR>
For the next few months you'll see a lot of changes and new information.  Check out the updated Directory
for current office locations, phone numbers and e-mail addresses of personnel worldwide.<BR>
Please send any comments or suggestions about the development of this site to webmaster at<BR>

<table border="0" cellpadding="8">
<td><a href="newdirectory.html"><img src="directorybutton.gif" border="0"></a></td>
<td width="50%"></td>
<td><a href="products.html"><img src="productsbutton.gif" border="0"></td>


More information about the Plant-ed mailing list