Transparent film

Transparent film is the general term for light-transmitting plastic films that let shoppers see the product. Clear grades of BOPP, PET, CPP, PE and OPA, and laminates made from them, all fall under this heading.

Why it matters

For nuts, pasta, pulses, granola, sweets and pet treats, seeing the product sells it. Clear film can cover the whole pouch, or a printed pouch can leave a window unprinted.

How a clear pouch is built

Typically two clear films are laminated, such as PET/PE or BOPP/CPP. The outer film is reverse printed; areas that should be opaque get a white underprint, while the window is simply left free of ink, so windows of any shape cost nothing extra in tooling.

Barrier trade-off

Standard clear films do not block light and have limited oxygen barrier. Light can speed up rancidity and colour fading, shortening shelf life. Where oxygen protection is needed, EVOH or transparent barrier-coated films (such as AlOx or SiOx coatings) keep clarity at a higher cost. For chilled fresh produce, an anti-fog sealant stops condensation from hiding the product.