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<div class="moz-cite-prefix">Dennis,<br>
I did not find a roll film. I did use a 1/4" polycarbonate sheet.<br>
The manufacturer made a custom color to meet my transmission
criteria.<br>
<br>
I wanted transmission <0.01 (my definition of "cutoff") at
450nm<br>
I wanted the material to look yellow (cutoff between 450 and
480nm)<br>
"yellow" products do not meet this spec. (cutoff ~430nm)<br>
"amber" products meet this spec but I considered them too dark.
(cutoff is ~550nm)<br>
I requested a custom "double yellow" product.<br>
(i.e. put 2x the amount of yellow dye in the same thickness
product)<br>
<br>
What I received was a 3x product - and I liked it.<br>
And it met transmission criteria cutoff was ~470nm<br>
I proposed that the manufacturer<br>
call this custom color "Golden Bear Yellow 1868"<br>
They had a minimum order requirement to make a custom color<br>
but then cost was equivalent to off the shelf colors.<br>
<br>
Manufacturer: Sheffield Plastics<br>
Product: Makrolon<br>
<br>
Good Luck<br>
Bill Flounders<br>
UC Berkeley<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
Dennis Schweiger wrote:<br>
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cite="mid:CAKzi2_NcGuu5-V1PrKcfDQQwHDpwa8WMr5rGGKUTXFbhg+YuNg@mail.gmail.com">
<div dir="ltr">Good morning all,
<div><br>
</div>
<div>we're in the process of upgrading our lighting, and
correcting a couple of the "yellow" light issues we've
uncovered. We have windows within our facility that should
have been covered, but weren't, and have some currently
installed films that don't filter out as much UV as we'd
like. Has anyone recently worked with a film manufacturer,
and found someone that can provide a roll stock material that
works for them in a glass application, and something they're
happy with? The couple of places I've contacted so far are
more into architectural films, so they're all over the variety
of colors, but when I broach the subject of wavelength
filtering to remove UV, it seems that's a "mad scientist"
request.</div>
<div><br>
</div>
<div>Thank you,</div>
<div><br>
</div>
<div>
<div>
<div class="gmail_signature"
data-smartmail="gmail_signature">
<div>Dennis Schweiger</div>
<div>Facilities Manager</div>
<div>University of Michigan/LNF</div>
<div>1301 Beal</div>
<div>Ann Arbor, MI 48109</div>
<div> </div>
<div>734.647.2055 Ofc<br>
</div>
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