Appearance: If the thermal paper is super white, it means that the protective coating and thermal coating of thermal paper are unreasonable, Too much phosphor is added, The better thermal paper should be slightly greenish. If the thermal paper looks uneven, it means that the thermal paper coating is uneven, If the thermal paper seems to reflect strong light, too much phosphor is added, and the quality is not very good.
Fire roasting: The method of roasting with fire is also very simple. Use a lighter to heat the back of the thermal paper. If the color appearing on the thermal paper is brown, indicating that the thermal formula is not reasonable, and the storage time may be shorter. The black part of the thermal paper has small stripes or uneven color patches, indicating uneven coating. The better quality thermal paper should be black and green (with a little green) after heating, and the color block is uniform, and the color gradually fades from the center to the surroundings.
Sunlight contrast identification: The printed paper is painted with a highlighter and placed under the sun (this can accelerate the reaction of the heat-sensitive coating to light), which paper turns black the fastest, indicating that the shorter the storage time.
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Thermal paper shortage situation still ongoing, which makes thermal paper cost rising month by mont, and this situation no... read more
