The DX number is a number which uniquely identifies the type and manufacturer (sensitizer) of a film emulsion. These DX numbers were assigned by the International Imaging Industry Association (I3A), which published and sold a proprietary list of DX numbers for APS and 135 film yearly or as needed.
The DX number is a number which uniquely identifies the type and manufacturer (sensitizer) of a film emulsion. These DX numbers were assigned by the International Imaging Industry Association (I3A), which published and sold a proprietary list of DX numbers for APS and 135 film yearly or as needed.
Source: Wikipedia "DX number" · CC BY-SA 4.0
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