Method of Analysis for Plain Aluminium Blister Foil

Description
Aluminium foil printed in one or more colours.

Dimension
Limit: ±2 mm of the specified width of the foil

Grammage
Take a piece of aluminium foil and cut a perfect square piece of 5 x 5 cm or based on the specimen and weigh. Calculate the GSM

Calculation:

Limit: ± 8% of the specified grammage.

Text Matter
Should be complying with the approved artwork.


Thickness of Aluminium in Blister Foil
Rub the piece of aluminium blister foil already taken for grammage to acetone-soaked cotton bud to remove VMCH (Vinyl methyl chloro hexane) coating, After removing the VMCH coat weigh the piece ie W2 gm
Determine the thickness of the aluminium using the formula.

Calculation:

NOTE: 2.71 is the density of aluminium

Limit: ± 0.005 mm of the specified thickness

Pin Holes
No pinholes should be present

Cleanliness Check
Check the cleanliness of printed aluminium blister foil. The test passes if the foils are free from dirty, mutilated, torn or stained, improper printing and pin holes.

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