Description This application is a continuation of application Ser. Two of the most important are a flat and smooth surface to facilitate printing in a press and gloss to produce a more attractive surface, particularly after printing.
Thermal paper A receipt printed on thermal paper. A heat source near the paper will color the Termal coating papermaking. Paper roll for thermal fax machine.
Thermal paper is a special fine paper that is coated with a chemical containing BPA that changes color when exposed to heat. It is used in thermal printers and particularly in inexpensive or lightweight devices such as adding machinescash registersand credit card terminals.
The surface of the paper is coated with a solid-state mixture of a dye and a suitable matrix; a combination of a fluoran leuco dye as an example. When the matrix is heated above its melting point, the dye reacts with the acid, shifts to its colored form, and the changed form is then conserved in a metastable state when the matrix solidifies back quickly enough.
The reactant acid in thermal paper is often bisphenol A BPA. Usually, the coating will turn black when heated, but coatings that turn blue or red are sometimes used. While an open heat source, such as a flame, can discolor the paper, a fingernail swiped quickly across the paper will also generate enough heat from friction to produce a mark.
Multicolor thermal paper first became available in the early s with the introduction of the Fuji Thermo-Autochrome TA system.
History The earliest direct thermal papers were developed by NCR Corporation using dye chemistry and 3M using metallic salts. The NCR technology became the market leader over time, although the image would fade rather rapidly compared with the much more expensive, but durable 3M technology.
Texas Instruments invented the thermal print head inand the Silenta computer terminal with a thermal printer, was released in the market in The Silent was the first thermal print system that printed on thermal paper.
During the s, Hewlett-Packard integrated thermal paper printers into the design of its HP series desktop computers, and integrated it into the top of the series CRT terminals as well as in plotters.
In the s and early s, Japanese producers such as RicohJujo, and Kanzakiusing similar dye-based chemistry, formed partnerships with barcode printer manufacturers such as TEC, Sato, and others and entered the emerging global bar code industry, primarily in supermarkets.
In this paper, ink jet paper coating formulations made of pigments (Al2O3?SiO2?CaCO3),polyvinyl alcohol(PVA) and brightening agents were studied. Effect of pigments, binders, dispersants, brightening agents and color-fixing agents on printing property and paper whiteness were benjaminpohle.com benjaminpohle.com offers 8, papermaking chemical products. About 17% of these are paper chemicals, 9% are textile auxiliary agents, and 8% are petroleum additives. A wide variety of papermaking chemical options are available to you, such as coating auxiliary agents, benjaminpohle.com China Paper Machine manufacturers - Select high quality Paper Machine products in best price from certified Chinese Paper Machinery manufacturers, Paper Making Machine suppliers, wholesalers and factory on benjaminpohle.comps://benjaminpohle.com
Leading pressure-sensitive label producers such as Avery Dennison became major consumers of direct thermal paper for label applications. In the late s and early s, thermal transferlaser printingelectrophotographyand, to a lesser extent, ink jet printing began to take away industrial and warehouse barcode applications due to better durability.
Direct thermal made a strong comeback with point of sale receipts gasoline pumps, cash registers, rental car receipts, etc. DuringNintendo used thermal paper technology for their Game Boy Printer.
InNCR Corporation's Systemedia division introduced two-sided thermal printing technology, called "2ST" Chemistry Four different types of imaging chemicals are used in thermally sensitive papers: A third widely used leuco dye is Crystal Violet lactone.For more information click on the Thermal Management Coatings Data Sheet below.
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