The choice of thermal paper is particularly important. Choosing a good thermal paper can greatly protect the label printer and save the print head.Many times in the process of printing paper, the most expensive is the best. It is important to choose the most suitable printing paper.How to buy heat -sensitive paper? It can be viewed through the appearance.Lets take a look at it together.
How to make thermal paper
Thermal paper is a kind of processing paper. Its manufacturing principle is to paint a layer of "thermist coating. The thermal component in thermist paper coating is mainly two types: one is colorless dye or nameHidden color dye; the other is a color rendering agent.
After the heat -sensitive paper is hot, the color reaction occurs in a chemical reaction of the colorless dye and the toner, so when the thermist paper receives the signal printing on the fax machine or prints directly with the thermist printer, the graphic is displayed.Because there are many species used for colorless dyes, the color of the handwriting is different, including blue, purple -red, black, etc.The commonly used lottery is thermal paper.
How to buy thermal paper
Thermal printing paper is generally divided into three layers, the bottom layer is paper base, the second layer is thermal coating, and the third layer is a protective layer, which mainly affects the thermal coating or protective layer of its quality.
If the coating of thermal paper is uneven, it will cause dark colors in some places when printing, and some places are light in color. The quality of printing is significantly reduced.It is very short. After printing a good print paper, it can be saved (under normal temperature, avoiding direct sunlight) for 5 years. Now there are long -term thermal paper that can be preserved for 10 years, but if the formula of thermal coating is unreasonable, it is unreasonable., It may only be preserved for a few months.
Protective coating is also critical for the preservation time after printing.The protective layer is on the thermal layer. The purpose is to protect the thermal layer, chemical resistance, and prevent label pollution (such as sweat on hand, blood stains on the blood bank, etc.) and the purpose of protecting the printed head.It can absorb part of the light that causes thermal coating to generate chemical reactions, slow down the deterioration of printing paper, and can protect the thermist component of the printer is not damaged. However, if the protective coating is unevenLand protection, even during the printing process, the small particles that protect the coating will fall off, and the thermist component of the printer will cause damage to the printing thermist component.
The quality of thermist paper quality
1. Appearance
If the paper is very white, it means that the protective coating and thermal coating of the paper are unreasonable, adding too much fluorescent powder, and the better paper should be slightly green.The cleanliness of the paper is not high or it looks uneven, indicating that the paper coating is uneven. If the paper looks strong, it also adds too much fluorescent powder, which is not very good.
2, fire grill
The method of grilling with fire is also very simple. Use a lighter to heat on the back of the paper. If heated, the color appear on the paper is brown, indicating that the thermal formula is not reasonable, and the preservation time may be relatively short.There are small stripes or uniform color blocks, indicating that the coating is uneven.After heating, good quality paper should be black and green (with a little green), and the color block is uniform, and the color of the surroundings gradually fades from the center to the surroundings.
3. Comparison of sunlight illumination
Apply the printed paper with a fluorescent pen and place it under the sun (so that the thermistor can accelerate the reaction of the thermal coating to the light). Which kind of paper becomes the fastest, the shorter time that can be preserved.