What OTR means, and why it decides your shelf life
Oxygen transmission rate is the one number that tells you how much oxygen gets through your film.
Cheese and deli
EVOH or PVDC: choosing a barrier layer
Both block oxygen very well. They behave differently in humidity and heat.
Thermoforming or skin packaging?
Both run on rollstock machines. One makes a tray and lid, the other wraps the product like a second skin.