Class 99 & 99K
Protection Against Rust Damage
Lint and fluff, if not removed prior to storage will, during humid periods, absorb and hold moisture, and thus accelerate rust damage to highly polished thread handling and other exposed parts. The extend of rust damage would depend upon the length of time the machine remained in idle storage where there is no ventilation. Sudden drops in temperature till cause moisture to form on parts which, if not protected by a film of oil, would rust and damage while in storage.
Proper storage care suggests thorough
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