Sorption curve - 12571:2021

[Matthew Smith]

Dear IBP,

How many samples undergo sorption testing when a material is added to the database?
When I look at a sorption table am I looking at averaged results or the test of a single sample?
Are there minimum sample numbers required for manufacturers when undertaking 12571 testing in the 2021 update? For certain materials that might exhibit different behaviour at different thickness, do they need to test each available thickness with 12571 and pressure plate or just a couple?
Should 15026 be updated to set a framework for this?

Best regards and sorry for cascade of questions,

Matt