The specifiation of the efflux time is already very narrow.
Aproximateley 43 seconds means between 41 and 45 seconds on 20° C
with a DIN 4 cup.
Please check again it is not 42 seconds it is 45 seconds max. value.
If the blister coating is not in this range we will not send it to customers.
For that reason it makes no sense to send a quality test certificate for
every order.
Trough the influence of raw materials and aditives we need a minimum and
and maximum value for the ph-value, this is normal.
The warant shelf life of WB blister coating 359509 FP DC is 6 months.
A best before date is printed on any container or barrel.