We have a huge volume of types of fabrics and new batches arriving all the time.
We do not test fabrics on a regular basis.
There maybe small differences between each batch of fabric of the same type - always best to test yourself.
It is really useful when customers share information so we are begining here to collect information and many thanks for those who are kind enough to take time to share this information
So here is information from Lucie Ro in France - thanks Lucie.