Operation in Tropical and Desert Areas

TM 11-405-10

and condenser lens assemblies with the lens tissue. If

equipment. Dust the negative carriers before loading.

moisture has condensed on the inside surface of the

Use a camel's hair brush and clean all lens outer-glass

projection lens or condenser lenses, leave the lamp

surfaces before using lens tissue. Lens tissue will

turned on until the moisture evaporates.

scratch the glass elements if they have not been dusted

previously.

30. Operation in Tropical and Desert Areas

b. Tropical Regions. In climates of high humidity,

When the processing set is used under conditions of

such as in the tropics, inspect the equipment daily for

extreme heat and humidity, such as in desert or tropical

traces of fungus, mold, mites, and metallic corrosion.

regions, observe the following precautions.

Remove all fouling immediately. Lubricate the enlarger

a. Desert Regions. Before using the equipment in

after cleaning (refer to the applicable technical manual

desert regions, use a soft-bristled brush to remove sand

and other foreign matter on the surfaces of the