Glass Photometric Results


SGF, Supreme Grumble Framer
May 8, 2003
Lubbock, Texas
If anyone is interested, my ophthalmologist analyzed three glass samples for me (out of curiosity). The samples are clear, conservation clear and museum from Tru Vue.

This result is plain clear glass. The amount of UVB allowed through was 22% and UVA was 80% and allows 94% light to pass trough.

This one is TV conservation Ultraclear. It blocks all but 2% of UVB/UVA and allows 91% light transfer.

And this one is TV’s museum. It blocks all but 2% of UVB and 1% of UVA and allows an impressive 98% light transfer.
I love it when doctors have time to do something useful without expected compensation.

I am impressed with the T/V museum!

PS: You didn't pay him to do that, did ya?? Unless he charged it to your HMO....
HMO? is that code for something?

He asked all the right questions when it came time to discuss glazing options for his art. He taught me a few things about optics; coatings etc and I gave him lessons on quality framing and preservation practices. I think he wants me to buy glasses from him and I probably will. :D
cool - good to see that they aren't just pulling our legs with all that fancy talk!!
Those numbers match Tru-Vue's published test data. They have similar curves in their literature.

The difference between 91% and 98% visibility may not seem like much, but when you actually see the glass products side-by-side, the difference is very clear.

If you do not yet have the "tassel display" that shows Museum Glass and Conservation Clear together, I suggest you order it from Tru-Vue or your distributor. It is an excellent point-of-purchase tool.
If you get the tassel display, order extra glass cleaner so you can wipe off all the fingerprints from the people who don't believe there's glass there. :D

Truview has a similar display for their acrylic too. They are both excellent sales aids.

Dave Makielski
That acrylic display with the blue tassels is what sold our first order of Museum Acrylic.. at $800. :eek: But she saw the difference.

David, would you mind if I/we captured the photos and explainations you provided and print them out so we can use them as a sales tool?

[We get a lot of engineer types]
Baer, et-al,
Please use the pictures for your own use, posting here is the benefit for all.
We've done a number of "real life" tests, over the last couple years, on TV glass. The results are mixed, and I don't have pics, so you can take my word or not. All tests were done single-blind, split glass with Alpharag mats front and back. The pictures were rotated periodically to make sure light was distributed as evenly as possible. With newsprint, there is a dramatic difference in the first few weeks, but after about 12 weeks the newsprint began to even out fade-wise, and after 24 weeks you could not tell which side was regular, and which was TV. A digital print (HP inks) showed less dramatically in the first 12 weeks, but did show a significant (visually, not to be confused with statistically) difference after 12 weeks, and 24 weeks later the difference is still strong, though both sides are fading. An old Natty Boh Beer poster has shown very little fade on either side even after 18 weeks, but we’re still watching. An early 70’s one-sheet poster showed similar results as the digital print, though not as dramatically. What this has led us to conclude is: Yes there is an effect for the TV glass, though it varies depending on medium, and either way, most things will fade no matter what. We advise all our customers that TV is better than regular, but just like suntan lotion, burn will occur either way, just more slowly with the TV – so keep it out of the light if it is important.