Wayne DW-10 Operation Manuals page 6

1.2 Paper Type, continued
Adhere to the cautions below when using or when storing the paper.
Caution:
Avoid allowing the surface of the paper to contact with chemicals or oils as
this may cause the paper to become colored or the printed data on it may
become erased.
Avoid scraping on the paper surface with your nail or a metal object as this
may cause the surface of heat-sensitive paper to become colored.
Do not expose the paper to the effects from heat, humidity, or sunlight as
heat-sensitive paper starts getting colored at approx. 70 degrees.
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P/N 000-920921- Rev 0D 04/2015