Paper Testing

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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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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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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Tensile strength and strain at rupture are determined as values characteristic of paper strength (ISO 1924, 1992). The tensile strength together with the sample width gives the tensile strength per unit width, measured in N m–1. Together with the sample thickness the tensile strength can be expressed in kPa. The tensile index results from...
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The bursting strength is important in the characterization of packaging papers. The bursting strength of paper is determined in accordance with ISO 2758 (2001) and that of board in accordance with ISO 2759 (2001). In the testing instrument, the free area of the sample stretched in a circular frame is exposed to increasing pressures...
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