Carbon dioxide transmission rate (COTR) is the measurement of the amount of carbon dioxide

Carbon dioxide

Carbon dioxide is a naturally occurring chemical compound composed of two oxygen atoms covalently bonded to a single carbon atom...

gas that passes through a substance over a given period. It is mostly carried out on non-porous materials, where the mode of transport is diffusion, but there are a growing number of applications where the transmission rate also depends on flow through apertures of some description.

Further reading

• Brody, A. L., and Marsh, K, S., "Encyclopedia of Packaging Technology", John Wiley & Sons, 1997, ISBN 0-471-06397-5
• Massey, L. K., "Permeability Properties of Plastics and Elastomers", 2003, Andrew Publishing, ISBN 978-1-884207-97-6

Standards

• ASTM D1434 - Standard Test Method for Determining Gas Permeability Characteristics of Plastic Film and Sheeting
• ASTM F1115 - Standard Test Method for Determining the Carbon Dioxide Loss of Beverage Containers
• ASTM F2476 - Test Method for the Determination of Carbon Dioxide Gas Transmission Rate (Co 2TR) Through Barrier Materials Using An Infrared Detector