GSO ISO 19399:2021

ISO 19399:2016

Gulf Standard Current Edition · Approved on 01 July 2021

Paints and varnishes — Wedge-cut method for determination of film thickness (scribe and drill method)

GSO ISO 19399:2021 Files

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GSO ISO 19399:2021 Scope

ISO 19399:2016 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.