For any printer with ID copy function, there is always a preset parameter for the Darker/Lighter setting. This default setting is hard coded in the printer for each SKU, within the group of countries, for example, China/India SKU. There is also a feature within the printer that allows the user to adjust the parameter using the control panel based on their preference of the copy job.
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INC, HP, "METHOD OF USING IMAGE ANALYSIS TO SET DARKER/LIGHTER PARAMETERS FOR ID COPY", Technical Disclosure Commons, (August 31, 2022)