The Alum/PVC foil is made from a thin aluminium layer laminated with PVC (polyvinyl chloride). it foil is lidding foil. There are two types of foil printed and unprinted foil, the printed foil is printed text matter on the aluminium layer side. The PVC layer side is the inner side of the foil. The foil is used in packaging pharmaceutical finished products like tablets and capsules. Its foil is a better barrier to moisture, air heat, and other environmental conditions.
- Total Grammage:
The sample of Alum/PVC Foil is total Grammage testing. The sample was cut into 10 x 10 cm2 or 5 x 5 cm2 area with the help of a GSM plate. If the sample is printed, then remove the text matter with the help of cotton or tissue roll dipped in ethyl acetate, rubbing on the text matter once the text matter is clear dry the sample at room temperature. Weighing the sample at analytical balance, calculate the total Grammage by the given formula,
Total Grammage = weight in grams x 100 or 400 (if the sample cut 10 x 10 cm2 or 5 x 5 cm2)
- PVC Layer Grammage:
The total Grammage sample was taken and dipped in an ethyl acetate-containing glass beaker. After some time 10 to 15 min, both layers are separated, an aluminium layer and a PVC layer. Both layers are washed with water and the sample dry in a hot air oven for 2 min at 650c. Cool the sample in a desiccator. Weighing the sample at analytical balance, calculate the Grammage of PVC Layer by the given formula,
PVC layer Grammage = weight in grams x 100 or 400 (if the sample cut 10 x 10 cm2 or 5 x 5 cm2)
- Aluminium Layer Grammage:
The sample of separated aluminium layer weighing the sample at an analytical balance, calculation by the given formula,
Aluminium layer Grammage = weight in grams x 100 or 400 (if the sample cut 10 x 10 cm2 or 5 x 5 cm2)
I am Maneesh Maurya a professional pharmaceutical blogger from India having rich experience in the pharmaceutical Quality control field.
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