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920017-148
Operator Manual
Routine Maintenance
Thermal paper is subject to fading with time, humidity, and exposure to light.
It is the manufacturer's recommendation that thermal paper be stored in a dark
place with an average ambient temperature of less than 77°F (25°C) and a
relative humidity less than 65%. Under these conditions, the paper remains
readable for at least five years. It is recommended that if printed data is to be
retained for periods of time longer than 5 years (6-25 years), an additional
photocopy should be made for record retention. In any case, a duplicate set of
records should be maintained in the files of the engineering or maintenance
departments.
Thermal paper begins to develop color at about 158°F (70°C). However, under
humid conditions, it might begin to develop at an accelerated rate. If stored for
24 hours at 140°F (60°C), the paper shows some signs of development. It also
shows signs of development if stored for 24 hours at 113°F (45°C) and a relative
humidity of 90%.
Do not store thermal paper next to other chemically treated papers - such as
pressure sensitive paper or other type of recording round charts - as this may
cause fading in print. If thermal paper is to be stored in the same area, always
ensure it and other chemically treated papers are kept in separate envelopes.
Thermal paper discolors when exposed to direct sunlight.
6.6.2 Thermal Paper
Storage
