Set the bar thickness reduction factor to the percentage value specified in the i parameter.
This is the percentage by which the bar thickness is reduced – used primarily to allow for ink spread.
For Maxicodes this parameter should generally be set to at least 12 to ensure that adjacent barcode elements (hexagons) do not touch.
Default: 0 for barcode types other than Maxicode
Default: 12 for Maxicode
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