M00001110
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ISO 19399 1st Edition, May 1, 2016 Paints and varnishes - Wedge-cut method for determination of film thickness (scribe and drill method)
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Availability date: 07/13/2021
Description / Abstract:
This International Standard specifies a destructive method for determination of the dry film thickness, in which damage to the coat caused in a definite manner is evaluated microscopically. The method is suitable for almost all coat-substrate combinations and also allows determination of the single film thicknesses of coating systems.
The method cannot be applied or can only be applied with restrictions in case of
— too soft and/or elastic coatings (no recognizable scribe or drill hole can be observed),
— hard (cannot be scribed/drilled) or too soft and/or elastic substrates,
— too low visual contrast between the coating and substrate, and
— film thicknesses that are larger than the depth of field of the measuring microscope.