Posts Tagged ‘ paper coating ’

Influencing Printability in Paper Coating

Influencing Printability in Paper Coating The evenness of the printed image is a very important criterion for quality. The acceptance of coated paper by printers depends on its runnability in the printing process and its printability in terms of an even image that is free of defects. The printability of paper is principally determined...
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Testing Of Paper And Paperboard :Strength Properties :General

Strength Properties The entire spectrum of analytical methods used for the chemical testing of paper ranges from gravimetric methods to spectroscopy, electrochemical and enzymatic methods, as well as sensoric tests on taste and odour and microbiological tests. Most of the testing methods to determine the composition are destructive. The components to be determined must...
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Testing Of Paper And Paperboard : Basic Properties

Basic Properties The basic properties of paper include the dimensions and the mass. In the case of sheet material such as paper, the basis weight mA is determined in accordance with ISO 536 (1995). The value mA is the ratio of the mass m to the area A of a sample. m  A =...
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Paper Coating Machines : General

Paper Coating Machines Overview Coating machines are separate machines in which a previously produced dry base paper is unwound, coated, dried, and then reeled again (Fig. 7.24). In contrast to coating applicators placed on-line in a paper machine (Section 6.8), they are usu¬ally called “off-line coaters” or “OMC” (off-machine coaters).   In a paper...
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Testing Of Paper And Paperboard :Chemical Paper Testing

Composition and Chemical Paper Testing The fiber composition of paper is determined with a light microscope (fiber micros¬copy). Due to the varying fiber morphology, both the fiber raw material and the pulping process can be determined. Chemical dyeing methods are used for con¬trast enhancement and quantitative determination of fiber composition (ZM IV/ 55/74; TAPPI...
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