Plastic film thickness can be measured in microns. Note: 1 micron equal to 1000th of a metre. The symbol for micron is “um” e.g. 50um = 50 micron. Typical thicknesses used for plastic bags are:
Minimum 15 micron – supermarket singlet bags, check out bags, takeaway shopping bags
20 to 30 micron – Clear LDPE bags for bread, packing and mailing bags
30 to 40 micron - Heavy duty garbage bags
40 to 50 micron – Press-seal bags, retail carry bags
50 to 75 micron – Bags for frozen food
75 to 90 micron - Medium to large boutique and department store carry bags
75 to 100 micron - Heavy duty industrial bags used to pack fertilisers and potting mixes
100 – 150 micron - Ultra heavy duty bags used for building supplies