Composite GSM formula for flexible packaging defines input entitlements and wastage allowances for export compliance.

Composite GSM of printed flexible packaging exports is calculated by summing GSM contributions of each film layer and functional inputs (ink, adhesive, additive, hotmelt), where film GSM equals specific gravity times thickness and liquid inputs are converted to dry weight on specified average solids; input entitlement per kilogram finished product is the component GSM divided by total GSM adjusted by declared wastage. Product construction determines which inputs and wastage rates apply, with additional rules for multilayer laminates, extrusion coating, pouch forms, conversion losses, holography, and exclusions for unprinted or non hotmelt products.

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