If you are facing the problem of Epson Printer won't print without color ink, then you can easily troubleshoot this issue by carrying out the steps given here. Firstly, cancel the print job by clicking on Stop. After that, you need to load sheets in the tray. Select “File” and then choose “Print”. Now, go to “Preference” and select “Main”. Choose the option of “Appropriate Quality” and then select Envelope as Type setting. After that, go to the checkbox of Grayscale and then check it. Then, click on OK and then close the window of printer settings. https://prompthelp.us/blog/my-epson-printer-to-print-without-color-ink/