Eight special paper application knowledge

NoCarbon Required paper: One side of the paper is coated with microcapsules (CB surface), the capsule contains pigment, and the other side is coated with a color developer (CF surface). When used, the CB surface must correspond to the CF surface. When pressed, the microcapsules on the CB surface are broken, the pigments escaping and react with the color developing agent on the CF surface to develop color, and this principle is used to achieve the replication effect. In general, NCR can be divided into three types: upper paper, middle paper, and lower paper, and the composition can be adjusted according to the number of copies required.

Thermal paper: The surface of the paper is coated with a paint containing a color material. The color material undergoes heating to produce a chemical reaction and develops color. A mobile thermal head can be used to develop a color in the heated area. The facsimile machine utilizes it. This principle is combined with a thermal paper to achieve the power of fax appearance.

InkJet Printing Paper: InkJet Printing Paper: The ink is directly sprayed on the surface of the paper and appears in the ink. To achieve the characteristics of small diameter, neat edges and high density, the paper must have a fine porous structure. In the case of multi-color ink jets, in order to reduce burrs, miscellaneous differences, and print-through phenomena, the water absorption and water repellency of the paper surface must be carefully controlled.

Plain paper copy (ppc for short): The paper used in the copier, in order to make the photocopying work smoothly, the paper needs to have the features of dimensional stability, antistatic, and good carbon ink.

Diazo Paper (Diazo Paper): The positive photosensitive paper made by coating the even (heavy) nitrogen photosensitive liquid with the raw paper, in order to obtain a uniform and detailed photosensitivity, the coated base paper must be evenly interlaced, free of impurities, and low pH. , high degree of glue and uniform and detailed paper.

Electrotatic Recording Paper: The surface of the paper is coated with a conductive layer and an insulating layer coating, and a voltage discharged from the needle-like electrodes can be used to damage the insulating layer on the paper surface to form an electrostatic latent image with the conductive layer, so that the developer It can be attached to the pattern when it is added, and then it is fixed on the surface by a hot melt to produce a clear pattern.

Optical Paper (Opitical Character & Mark Reader Paper): The paper used for reading on optical readers is used to read texts. The figures are called QCR, and the readers call OMR because they use optical absorption or reflection to read special marks. To avoid misreading, it requires high cleanliness, smoothness, abrasion resistance, dimensional stability, and electrification prevention.

Magentic Ink Character Reading paper (MICR paper): The surface of the paper is coated with ferromagnetic fine-grained powder, and magnetic ink can be used to print papers that can be recognized by computer, mainly for valuable ticket, such as securities, Tickets, passes, etc.