General Testing Procedure For Printed Aluminium Blister Foil

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 1^st poly / Alu. / 2^nd 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.