Cupping test of a paint coated metal

Presentation for participants

                       
 
Reference of the ILC: CT19PC
References of test methods: ISO 1520            
Frequency: Each 3 years
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
15/12/2018 15/03/2019 20/05/2019 01/06/2019 15/07/2019 15/10/2019
Note: After the deadline, registrations are only accepted within the limit of availability of samples
Main characteristics Cupping depth which causes cracking or peeling
Other characteristics Thickness of coating
  Caution: The number of determinations may be low for the secundary characteristics, what may make inefficient the comparison between laboratories
                   
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: Results are numerical. For each characteristic selected by the participant, 1 result shall be provided for each sample. The statistical computation will provide an assigned value with its attached uncertainty, values of standard deviations for repeatability, for reproductibility, limits of alerts for bias and repeatability of the participant, indiviual values for uncertainty of results of participants.
Number of samples per participant: 10
Product submitted to tests: Paint coating (on steel)
Type of samples: Plates
Approximate dimensions of samples: 70x210x1 mm
Specific preparation to be performed by the participant:  None (other than possible necessity to adapt dimensions of the test specimen to the equipment of the participant)