Over the years we have had very few complaints regarding playback problems
with either company's overlay. In our experience, the person applying the
overlay must to be very careful to avoid bubbles which may very well upset
the disc's balance, thus its playback.
I'm not sure how effective these overlays are in terms of tripping our
security gates. However, the overlays seem to work fairly well as a visual
deterrent to potential theft.
Torrance Public Library
From: Matthew Ballard [mailto:email@example.com]
Sent: Tuesday, December 07, 2004 4:59 PM
Subject: RE: [Videolib] 3M DCD-2 Overlay
At Otis we use security labels from http://www.videostoreshopper.com/ , item
#30-820 . I've never compared them to the 3M ones (the decision to use them
was made before I was here, and the 3M ones are more expensive than what I
would want to experiment with), but they seem to work well, at least for us.
They aren't as reliable as we would like at times when it comes to tripping
off the gates, but I have no idea how it compares to the 3M ones (and we
don't find the system to be all that reliable in the first place, for any
media, but that's our experience, these strips seem to be similarly reliable
as compared to the video strips from 3M). I don't think I've ever seen a
case of a playback problem with those overlays, the only problems we've had
have been related to scratches and similar situations.
It also helps that they are considerably cheaper than the 3M ones. Also to
note, they can't be demagnetized (which isn't an issue for us, as we pass
all video/cd/dvd materials around the gates anyways).
Otis College of Art and Design Library
>[mailto:firstname.lastname@example.org] On Behalf Of Pam Sailor
>Sent: Tuesday, December 07, 2004 3:03 PM
>Subject: [Videolib] 3M DCD-2 Overlay
>Does anyone have any experience with the 3M security overlays for DVDs?
>After using them for a new opening collection, we contacted 3M about a
>high rate of discs that would not play. They acknowledged a problem
>with application that can be avoided by using their application kit.
>The discs that would not play, or kept freezing, were slightly warped
>when the overlays were applied. So, we received instructions on
>removing the overlays and re-applying using these kits. The kit
>consists of a rubber
>mat that guides the user in keeping the disc flat to prevent this
>warping. What a nightmare! We are currently trying to find out which
>of our hundreds of DVDs are affected in this way, and whether it is
>cost effective to try to fix them. Anyone else experience this?
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