How to use Keith's free black and white printer test image for linearising the B&W print output of the Epson P7500 printer. The process and principles described here are applicable to almost any B&W photo print workflow - Canon or Epson based.
How to check for non linearity in your B&W print workflow, in particular how it can often crunch up shadow detail.
The [free] test image and links to all the different techniques for using it to linearise print output are available at: https://www.northlight-images.co.uk/test-image-for-black-and-white-printing/
There is a short guide to its more general for testing B&W printing at:
https://youtu.be/X3K3y7R7IMI