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Scratch resistance : DIN EN ISO 1518
Using an Erichsen hardness test pencil , the scratch resistance of markings is tested by exposing them to point or linear stress . A defined force is applied to an engraving needle via spring tension . The spring tension under which the Erichsen hardness test pencil leaves a barely visible trace is the deciding factor .
Grid test : DIN EN ISO 2409
The Tesa test is used to test the adhesion of printing . A transparent self-adhesive tape with an adhesive strength of 10 ± 1 N is applied to the printing to be tested and is then removed from the surface at an angle of 60 ° to the pull-off direction . There should be no marks from the printing on the adhesive tape after the test .
Adhesion : FINAT 1 , 2 , and 9
To determine the adhesive strength of a label on a base material , a strip of labels ( 25 mm x 175 mm ) is applied with a specified force . The test sample is then removed after a defined wait time , at a predefined angle , at 300 mm / min . The adhesive strength is specified in N / 25 mm .
Degrees of protection : DIN EN 60529 / ISO 20653
Differing ambient conditions and requirements necessitate a clear classification of markings in IP degrees of protection . These are indicated by a code consisting of two numbers following the IP abbreviation . The first number describes the scope of protection against the ingress of foreign bodies , and the second the tightness of seal against moisture .
Vibrations : DIN EN 50155
To simulate vibration stress that occurs in practice ( e . g ., in the railway industry ), the marking materials are exposed to increasing and decreasing frequencies and amplitudes . They are tested in the three axes ( x , y , z ) for five hours each , and must not be damaged and their secure positioning must not have been impacted .
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