Royal Sovereign RSC-5500H Service Manual page 32

3.Pressure mark checking (Heat Line)
stop the machine for 30 seconds to
create a heat line. Then check to see if
you have two even parallel lines from
one end to other. Note: A narrow parallel
lines indicate that it has less pressure
at that point.
4.Laminating Test – Laminate samples
with different thickness of substrates.
5.Check above steps 2 through 4 with
3mil & 5mil films.
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