IPC-TM-650 2.3.18 "gel time, prepreg material" 4.1
states" Platen, hot plate or melting point apparatus
capable of maintaining a temperature of 171.5 C +/-
0.5 C (340 F +/- 0.9 F).
Is that mean laminators need to have a thermalmeter
with accuracy better than 0.5 C? I audited several
plant but can not find one can meet this requirement.
How big is the impact on gel time test result if gel
plate temperature shifted?
Regards
Shirley
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