The paper roll is likely backward. Thermal paper only prints on one side; ensure the glossy side is facing the thermal head.
: Supports USB, Bluetooth (for Android/iOS), and RJ11 for cash drawer control. OS Support : Compatible with Windows (XP to 11), Linux, and macOS. Zero Maintenance z58b thermal printer driver top
Windows Update sometimes overwrites the Z58B driver with a generic one. The paper roll is likely backward
Which are you using (Windows, Android, or iOS)? How are you connecting (USB or Bluetooth)? What error or behavior are you seeing? Bluetooth (for Android/iOS)
Before downloading a driver, check how your printer connects to the computer. The Z58B usually comes in two variants: