Thermal density setting. Solution: In the driver properties > Advanced > Printing Defaults > Graphics > Print Density: Set to 10-12 (medium-high) .
Disclaimer: URLs change, but search for the exact filename. The high-quality driver file for ARP990KC is typically named: mini receipt printer arp990kc driver download high quality
To download the ARP990KC driver, follow these steps: Thermal density setting
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