What a Mylar bag actually is, why its barrier is so strong, where it is used from food storage to pet products, and how it compares to other films.

Post-consumer recycled film explained: where PCR works, where it does not, what it does to barrier and print, and how to transition without surprises.

The polymers behind flexible packaging, what each film layer does, and how to pick a structure that balances barrier, cost and recyclability.

Kraft, coated, recycled and laminated paper bag materials compared on strength, print quality and cost, and when a flexible pouch suits the job better.