Quality Identification of Thermal Printer Paper Rolls
Thermal paper rolls as the communication carrier for words and pictures in fax machine, it is regarded as fax paper; in medical and meter measurement system, it is regarded as recording material; it is printer paper for internet terminal; in business, thermal paper rolls is used for making labels, POS, fax paper takes the largest proportion among them.
The working principle of thermal paper is putting particles of powder on the common paper whose ingredients is leuco dye phenols or other acidoid, they are divided by thin film, in the heat, thin film will melt with powder, the reaction between them causes words on the paper are unstable, they are faded easily.
About quality identification of thermal paper rolls
1. Appearance: if paper is very white, that is to say, protective coating and thermal coating of thermal paper is unreasonable with too much fluorescent powder, paper must be better with a little green, paper with low cleanness or it looks uneven, that is to say its coating is uneven. If paper looks with strong reflected light, it is also with too much fluorescent powder with bad quality.
2. Roast: it is easy to roast with lighter, heating on the back of paper, if it shows brown, that is to say its thermal recipe is unreasonable with short retention time, if there are some small stripes or uneven color lump, that is to say its coating is uneven. Paper with good quality should be black green ( with a little green) with even color-lump, its color is faded from center to around.
3. Compared to identify by sun shine: paint thermal paper with nite writer pen and put it under the sun ( it can speed up reacting), which one turns to black fastest, that is to say it is stored for shorter time.