Determination of resistance to humidity of a paint coating (one side exposed)
Presentation for participants
|
HU25PC1 |
|||||||||||
|
References of test methods |
ISO 6270-1 ASTM D4585 ISO 2808 ASTM B659 ASTM D1186 |
||||||||||
|
Frequency |
This ILC can be organised this year thanks to our preregistration procedure, which ensures an enough number of participants. |
||||||||||
|
Main characteristics |
Temperature of tests 60°C (140F) - Selected exposure times for assessment: 0, 3, 9 and 28 cycles of 24h - Rating of defects due to ageing in accordance with ISO 4628-2 and -3 - Cross-test against ISO 2409 |
||||||||||
|
after 28 cycles of 24h |
|||||||||||
|
Other characteristics |
t (thickness of coating) in accordance with ISO 2808, Rating of defects due to ageing in accordance with ISO 4628-4 and 5, Gloss coefficients G20, G60, G85 in accordance with ISO 2813, Colorimetric parameters |
||||||||||
|
|
L*-a*-b* in accordance with ISO 7724-1 to 3 |
||||||||||
|
|
Caution The number of determinations may be low for the secundary characteristics, what may make inefficient the comparison between laboratories |
||||||||||
|
Format of the test results: |
Results of some properties are numerical and some are expressed as a choice between several possibilities (categories). |
||||||||||
|
|
|
||||||||||
|
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. |
||||||||||
|
|
For results expressed as a choice between several possibilities (categories), Gower indexes are computed from the results, which enables the calculation of assigned values, repeatability and reproducibility standard deviations, limits of alerts for bias and repeatability of the participant, indiviual values for uncertainty of results of participants. |
||||||||||
|
Number of products submitted to tests |
1 |
||||||||||
|
Number of samples per participation |
6 |
||||||||||
|
Max number of operators per participation |
1 (it is necessary to order as many participations as there are participating test operators) |
||||||||||
|
Product submitted to tests |
Paint coated steel |
||||||||||
|
Type of samples |
Plates |
||||||||||
|
Approximate dimensions of samples |
150x100x1 mm |
||||||||||
|
Specific preparation to be performed by the participant |
Protection of the edges and the face not marked with a black felt-tip pen |
||||||||||
|
Special notice for this ILC |
The samples are provided with a scribe against ISO 17872 |
||||||||||
|
Time schedule: |
|||||||||||
|
Opening date of registrations |
20/12/2024 |
||||||||||
|
Registration deadline |
15/03/2025 |
||||||||||
|
Date of shipment of samples |
30/05/2025 |
||||||||||
|
Start of the tests |
03/09/2025 |
||||||||||
|
Deadline for carrying out the tests and providing the results |
27/10/2025 |
||||||||||
|
Date of delivery of reports |
06/12/2025 |
||||||||||
|
Note: After the deadline, registrations are still possible. Contact us at ilc@compalab.org for more information. |
|||||||||||
|
Price (€) |
425 |
||||||||||
|
Price if online payment (€) |
340 |
||||||||||
|
Approximate weight (kg) |
2 |
||||||||||