Bare foil is a rectangular cross-section cold rolled product with a thickness ranging from greater than 0.011 mm to less than 0.075 mm. It can be obtained in straight lengths or in coil form.

This standard covers Aluminium and Aluminium Alloy Bare Foil for Food Packaging of the following varieties:-

1. Preferred Nominal Thickness: 11,12,14,16,18,20,22,25,28,30,35,40,45,50,60,70 & 75 µm

2. Surface Condition:

• Dry Annealed

• Slick Annealed

The aluminium and aluminium alloy foil material must adhere to the chemical composition standards outlined in IS 737 for Grades 19000, 19500, 19600, 31000, and 40800. IS 10259 establishes the general requirements for supplying aluminium and aluminium alloy foil. The material should be provided in the fully annealed 'O' temper, with the option for other tempers if agreed upon by the purchaser. Foil rolls will be supplied in a pre-lubricated condition unless specified otherwise by the purchaser.

Each roll must undergo individual inspection to check for manufacturing defects, surface imperfections, and dimensional tolerances.

TESTS

The subsequent test must be conducted for Aluminium and Aluminium Alloy Bare Foil.

• Material

• Pinhole count

• Lubricants

• Dimensions

• Tensile Properties

• Freedom from defects

• Surface Conditions

Each package containing bare aluminium and aluminium alloy foil can be appropriately labeled for identification purposes, including the manufacturer's name, grade, material condition, batch number, and date of manufacture. Optionally, the Standard Mark (ISI Mark) may also be applied to the foil package. To utilize the standard mark, the manufacturer must acquire a BIS license from the Bureau of Indian Standards. This license is granted after a thorough evaluation of manufacturing infrastructure, production processes, and quality control and testing capabilities, conducted during a visit to the manufacturing premises.

PROCESS FOR BIS ISI MARK CERTIFICATION