Linux driver for HP LaserJet CP1025 color (CUPS)

Hi all, I have a great HP LaserJet CP1025 color for the last 10 years. it is still working fine and great. Now, I have installed a CUPS print server on a Pi. But, with the provided drivers all lines are blurry and unsharp. And the colors do not match. We installed HPlib already, for sure. And directly connected to windows, with the windows driver, everything is fine and crystal clar. We assume it is missing the correct Linux driver. Can somebody pls point me to a linux driver of the HP LaserJet CP1025 COLOR ? thanks, dominik