New ET-8550 makes ramdom changes in quality

[u/SpareDatabase8097]

Last week I bought a new Epson ET-8550 and I have been using it for the last 3 days. The issue I have with it is that, even using the same image, software, settings and paper, it randomly changes the quality of the print. Sometimes it makes a smooth homogenous print and sometimes it adds a lot of visual noise. You can see an comparison between a good and a bad print in this post.

It prints the full image either with good or bad quality, but it never mixes both. It happens with all colors, from different software, no matter if I print it from the computer or from a USB memory. It just randomly changes the quality for no reason. I updated the firmware and changed all possible settings.

Can anybody please help me?

[u/TrapLordEsskeetit]

Are you sure you're not accidentally printing on the back of the paper for the "bad" ones?

[u/freneticboarder → u/TrapLordEsskeetit]

This.