P3D RBT mounts

["Gary Nored" <gnored@xxxxxxx>]

I tried mounting them both ways with my TDC 715 projector,
30 secs. projection, but did not use a thermometer. The black-
side-to-the-light mounting was warmer to the touch, but not by much. My
feeling was that unless you left slides in the projector
a very long time, it wouldn't make any difference. On the
other hand, the black-side-towards-the-viewer approach is
_much_ better in a hand-held viewer. Which way you do it,
IMHO, is really more a matter of preference than of "right"
and wrong.

Gary NOred

Paul Talbot wrote:

> Linda Nygren wrote:
> >
> > From my own observations, I think that having the black side of the RBT
> > mount toward the observer seems to work the best in my Red Button
> > viewer,
>
> I agree with that assessment, but there is not unanimous agreement
> on the issue.
>
> > but I wonder if there is a "correct way" to do it, or if the
> > best way for projection would be different than the best for a viewer?
>
> Yup, for projection it is definitely best to have the white
> toward the lamps.  DrT did some temperature measurements
> some time back.  I wish I could recall the best key words
> to find the discussion in the archives.  It started with
> someone using toast, toaster, burn, melt, or something like
> that.  (BobW, do you have the automatic synonym and fuzzy
> logic search features up and running yet?  ;-) )
>
> > Also is there an up and down on the mount?
>
> I've always treated the edge with the horizontal line as
> the top, but I've never heard/seen anything official about
> this.
>
> > It looks like perhaps it only makes a diference
> > on the 4p, but I am not sure, again, whether there is
> > a "correct" or conventional way to do it.
>
> I haven't measured, but I'd be a little surprised if I were
> to find that the windows aren't centered vertically.  If they
> are not, my thinking would be the window would be better above
> the center line than below.  What did you see to suggest the
> 4P has a top and bottom?
>
> > I am also trying to figure out what kind of labels to put on these. (In
> > the past I have written directly on cardboard mounts, and I usually
> > pencil in date and subject preliminarily, as well as marking my better
> > ones with asterisks.) -Linda
>
> I think most people use Avery-type labels.  You might be able
> to pencil something on the white side.  I usually use stick-on
> spotting dots to mark my "better" slides.
>
> Paul Talbot
>
>