Can thermal paper still have thermal effect after dyeing?
It is normal for thermal paper to stain over time. In consideration of thermal activity or "thermal" dyeing, paper is an organic chemical coating of paper, other chemical agents, water and even different kinds of oils. Considering that many people store thermal paper receipts for financial management purposes, the loss of vital information content (especially in the most original documents) can have serious consequences, mainly including monetary and/or legal risk property damage . Fortunately, if the dyed thermal paper is all white and not completely brown or black, it will not be difficult to restore normal dyed thermal paper.
How can I restore normal dyed thermal paper?
● Scan the dyed thermal paper into a color picture, and then apply the unique attribute-specific tool of the photo editing software to create a negative image, that is, a black image, which is dyed and printed as white or full white. In the open image, select the heading "Negative" or the other dedicated tool option "Create Negative", then apply other enhancements to make the original white print more clear. For example, adjusting a certain level of contrast or smoothing or sharpening the print on an image.
● Apply a hair dryer to create a "negative" image. If you adjust the thermal paper copy after the scanner, the normal printing information will not be restored. Turn on the hair dryer and blow the heat gently, you want to restore the reverse side of the normal dyed thermal paper. Always keep the hair dryer at least 8 to 12 inches from the surface to avoid rapid blackening, which can completely blacken even the most original thermally printed information. If you don't have a hair dryer, use a light bulb, but keep the light bulb about 2 to 5 inches at all times, depending on the heat generated by the light bulb.
● Store a copy of the restored thermal paper document as a record, and store the most original hard copy in a cool, dry area away from ultraviolet light, water or chemically harmful substances.
Common considerations for reducing thermal paper staining:
● The reverse side of thermal paper is not easily thermally activated to form a "negative" image throughout. If you load paper too close to the heat source, you are likely to quickly lose the most original thermal print information.
● Use the reverse side of the paper to heat it all the way, so you can better measure whether the thermal paper is reactive heat.
● Before handling other thermal paper, please be sure to wash your hands and sanitize and do not touch the printed information, this is because the oil on the skin and other residual oils, stains or chemical agents on the skin will cause heat. sensitive paper reaction zone.
● Scanner thermal paper documents to avoid backup data loss originals or accidents, which will cause the thermal paper to heat up and turn completely brown or black and lose all printed information.