Description:
An Aluminium Blister foil printed with text matter as
per approved artwork and colour scheme.
Width:
Take a sample of 1 meter from each roll if the no. of rolls is less than
5. If the no. of rolls is more than 5 then sample should be taken by the
formula √n + 1.
Measure the width by measuring scale at
different places.
Take average of
above readings. Tolerance: ±
1.0mm
Thickness:
Measure the thickness by thickness gauge at different
places.
Calculate the average of thickness note it.
Printing:
Check the printing of foil with approved artwork or approved specimen.
Printing on sample foil shall match with approved specimen.
Measure the length (using a printing repeat length scale)
from the beginning of the first eye mark to the beginning of the last eye mark.
Slitting:
Should be perfect without cutting of any text matter.
Text matter:
Compare the text mater at sample with Approved artwork or approved
sample. If the text matter is similar to approved art work or sample then
release the sample.
Colour scheme:
Check the colour of foil with approved shade card/approved sample. The
sample colour should match with approved shade card/approved sample then sample
is release.
A.Total
Grammage:
Take 3 samples from 3 different rolls. Cut it to 05 X 05 cm, Weigh it and
calculate the Grammage with following formula.
Weight of the piece in gm X 100 X 100
Grammage = −−−−−−−−−−−−−−−−−−−−−−−−−−−−−−− gm/cm2
5.0
X 5.0
B. Grammage for 1st poly / Alu. / 2nd
poly Foil:
1. Take 3 samples from 3
different rolls, cut it to 05 x 05 cm, weigh it. Calculate the total Grammage
with above formula.
2. Then deep the piece
into conc. Nitric Acid for 15 min. Poly layer get separate from Aluminium Foil
and poly layer using filter paper. Weigh it.
3. Calculate
the grammage with above formula for all layers.
Scotch test:
No ink lifting from printed side on cell tape after removing the tape by
10 to 15 minutes from foil.
VMCH Coating:
VMCH is the Heat Seal Lacquer Coating given to the foil surface for Blister
packing. Cut a Piece of 5.0 x 5.0 cm and weigh it calculate total grammage,
then dip the piece into ethyl acetate, dry the piece and weigh again and take
difference between these two weights which is the VMCH coating .Calculate the
GSM of VMCH coating as per formula.
Pin Hole
Test:
Cut a one meter foil from the roll and check the
pinholes on the foil by pin hole tester.
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