The keys are made of Tenite plastic or one of it's derivatives, made from cellulose. It molds and mildews badly. In worse cases, the mold sort of corrodes the surface, and a mild abrasive polishing compound is needed to make the surface smooth again. Tenite aslo has a distinktive odor when heated or worked. I spent my youth in the place it was made, pieces of the plastic were easy to get, and the whole town had an "air" about it. Typists , however, liked the feel and "touch" of keys made of it, and it was quite popular for keyboards.
Bruce Gentry, KA2IVY
I know that others who have worked with these machines have encountered similar problems but I can't remember the exact products used to clean the keys and thought I would post about something I "discovered" while working on the machine I picked up a few weeks ago in Houston, TX.
73
Kevin
W5TTY
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