Determination of thickness, gloss and colorimetric parameters of a paint coating

Presentation for participants

Reference of the ILC


References of test methods

ISO 2808  ASTM B659  ASTM D1186  ISO 2813  ASTM D523
ISO 7724 Parts 1, 2 & 3  ISO 11664 Parts 1 & 4  ASTM E308

References of test methods for which the ILC can indirectly provide an assessment of performance

ASTM D1005  ISO 2178  ASTM B499  ASTM D7091  ISO 2360  ISO 3497
ISO 3543  ISO 1463  ISO 19399  ISO 3868  ISO 4518  ISO 2177
ASTM B504  ISO/TS 19397




These may be superseded standards, which some of the reference standards may have replaced, or EN or ASTM or ISO standards that are close but not exactly equivalent to the reference standards.



Each year

Main characteristics

t (thickness of coating), G20, G60, G85 (Gloss coefficients at 20°, 60°, 85°), L*, a*, b* (Colorimetric parameters)


Determination of the assigned values (“true values” for each characteristic)

By statistical computation of the totality of the results with possible selection on competence criteria (accreditation, validation by a reference body, quantity of tests performed in the year), test to detect possible collusion, merging of results not obtained in reproductibility conditions, suppression of technically unvalid results.

Type of statistical computation

For numerical results, the statistical computation will provide an assigned value with its attached uncertainty, values of standard deviations for repeatability and reproductibility, limits of alerts for bias and repeatability of the participant, indiviual values for uncertainty of results of participants.

Number of products submitted to tests


Number of samples per participation


Max number of operators per participation

10 (For this ILC, the type of test and sample size allow to provide results determined by several different operators and by several different methods)

Product submitted to tests

Paint coated steel

Type of samples


Approximate dimensions of samples

150x100x1 mm

Specific preparation to be performed by the participant

None (other than possible necessity to polish the test specimens or to adapt their dimensions to the equipment of the participant)


Special notice for this ILC

Results obtained by several methods may be provided


Time schedule:


Opening date of registrations


Registration deadline


Date of shipment of samples


Start of the tests


Deadline for carrying out the tests and providing the results


Date of delivery of reports


Note: After the deadline, registrations are still possible. Contact us at for more information.


Price (€)


Price if online payment (€)


Approximate weight (kg)