Cold-formed pharmaceutical foils are commonly used to package pharmaceuticals and other pharmaceutical products. It is manufactured through the process of cold rolling and forming thin aluminum sheets. The following is the manufacturing process of cold-formed pharmaceutical foil:

Material preparation:
The main material for cold forming pharmaceutical foils is aluminium. Aluminum was chosen for its excellent barrier properties, lightweight properties, and ability to be easily cold formed without compromising its integrity. The aluminum used is usually in the form of alloy sheets.

1. Cold rolling:
The manufacturing process begins with cold rolling, in which aluminum alloy sheets pass through a series of rolling mills. Cold rolling reduces the thickness of the sheet to the desired level. The process also enhances the mechanical properties of the aluminum, making it more suitable for subsequent cold forming.

2. Annealing:
After cold rolling, the aluminum sheet can undergo an annealing process. Annealing is the process of heating a material to a specific temperature and then gradually cooling it. This process helps to eliminate the internal stress generated during cold rolling and improves the cold forming ductility of the material.

3. Cold forming:
Cold forming is a critical step in the manufacture of pharmaceutical foils. The cold rolled aluminum sheet is fed into a machine called a blister machine or cold former. The machine uses a combination of pressure and low temperatures to form aluminum sheets into the desired shape. The machine consists of punches and dies that determine the shape of the final blister or container.

4. Lubrication:
To aid the cold forming process and prevent the aluminum from sticking to the tooling, a lubricant is often applied to the surface of the aluminum sheet. This lubricant reduces friction and wear during the forming process.

5. Cutting and trimming:
After the cold forming process is complete, the formed pharmaceutical blister or container is cut and trimmed to the desired dimensions. This ensures that each blister is the right shape and size for the intended drug product.

6. Quality control:
Throughout the manufacturing process, quality control checks are performed to ensure that cold formed pharmaceutical foils meet the required standards for thickness, shape, integrity and other specifications.

7. Printing and packaging:
After cold forming and quality control checks, cold formed pharmaceutical foils can go through a printing process to add essential information like product details, dosage instructions and branding. The foil is then wrapped to keep it clean and protected until it is ready for pharmaceutical packaging.

The alu alu foil manufacturing process may vary slightly depending on specific product requirements and the equipment used by different manufacturers.