scope:

This Part of EN 13523 specifies the procedures for determining the dry film thickness of an organic coating on a metallic substrate (coil coating).
Four appropriate methods are given in this Part of EN 13523:
a) Magnetic induction;
b) Eddy current;
c) Micrometer;
d) Optical.
The methods are applicable only to products with smooth and flat substrates but the coating itself may be textured. In that case, for methods a and b the average of a series of readings will represent an average of the thickness of the organic coating, while method c will give the maximum thickness and method d can provide the minimum, maximum and average thickness.
Non-destructive continuous-web methods on measurement of dry-film thickness (see EN ISO 2808) are not dealt with.