Re: Cardboard mounts

[P3D Marvin Jones <72657.3276@xxxxxxxxxxxxxx>]

> >Why is it suggested not to use cardboard mounts for projection?
> 
> I don't know... Don't let this stop you from using the projector!
> I have seen fine slide presentations with cardboard mounts.
> I know people who do great mounting job with cardboard mounts.
> The reason it is _recommended_ to use something else is for
> accuracy in mounting.  That's all.

I believe cardboard mounts are not recommended for projection for several
reasons. First, aesthetic -- the edges are not as smoothly cut as aluminum
mounts, and when projected, the roughness can really show up. Second, mechanical
-- cardboard mounts don't hold the chips as firmly. They tend to buckle more
easily when heated, and focus is much harder to hold. Also, cardboard mounts can
be bent fairly easily by some changer mechanisms, and since they are placed in
the projector "upside down," film chips have actually been known to slip out and
fall into the projector. And finally and most remote, safety -- cardboard mounts
sometimes have tiny shards of semi-detached cardboard clinging to the apertures,
and a hot projection lamp can singe and conceivably burn them, starting a chain
reaction fire.


------------------------------

End of PHOTO-3D Digest 1685
***************************
***************************
 Trouble? Send e-mail to 
 wier@xxxxxxxxxxxxxxx 
 To unsubscribe select one of the following,
 place it in the BODY of a message and send it to:
 listserv@xxxxxxxxxxxxxxx 
   unsubscribe photo-3d
   unsubscribe mc68hc11
   unsubscribe overland-trails
   unsubscribe icom
 ***************************