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In room environments with high humidity, the use of a high powered
Xenon slide projector or modified halogen lamps may cause the moisture
that is trapped in your glass slides to appear as a moving spot during your
presentation.
As the glass slide heats up, the moisture trapped inside will move as a
spot until it disappears totally. The moisture spot is on the inside glass
surface facing the light of the projector. The moisture will completely
disappear during your presentation.
Once you understand the cause of the moisture problem, there are some
very simple solutions to prevent it.
1. Keep your slides in a moisture-free environment before your presen-
tation. You can keep the tray in a plastic bag with silica desecant
which will soak up any moisture.
2. Use cardboard or plastic mounts when humidity is high.
3. Use new Wess Mount AHX high definition glassless slide mounts.
Free samples were enclosed with your Navitar Xenon projector.
For more information on AHX glassless slide mounts, call Wess
Plastic, Inc. at 1-800-487-9377 or 516-231-6300 or fax them at
516-231-0608.
According to Wess Plastic, Inc., their AHX glassless slide mount is
geared to hold the film in place for the best possible image sharp
ness. Two rows of eight registration pegs rigidly stretch the film to
prevent popping as the slide is heated in the projector. Film is
mounted by first placing it over the lower row of pegs, and then
hooking it over the upper row. It is then pulled tight and automati
cally seated by simply closing and squeezing the hinged mount
cover. Rigidity is also aided by the 3mm thick heat-resistant plastic.
We recommend using the AHX with professional (80 capacity)
slide trays.
4. Your problems with moisture will decrease when the outside humid
ity goes down.
Areas of High Humidity
Simple Solutions
Slide Moisture Problems
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