Below, you can find printable pages that help me to experiment with different paints, pigments, and colors. I've built these pages as A4-sized printable sheets. If you're using water-based paint, I recommend using thicker paper, and any artistic paper will work for dry mediums. Notice that your printer might not be able to process paper that is too thick.
The portraits in this booklet come from old movies now in the public domain. I downloaded those films, went through them frame by frame, and picked moments where faces were clear and expressive. Each image was gently enhanced to restore a bit of contrast and life lost over time. From there, I chose the ones I liked most — simple, well-lit scenes that are easy to draw from. This booklet is meant for practice, not perfection. Just faces worth sketching.
It's a printable implementation of Bruce MacEvoy's paint wheel.
I often paint with a limited palette; with this tool, I can visualize the color gamut of my paint selection.
Here, you can download Bruce MacEvoy's paint lightfastness testing matrix. I do the test occasionally to remove weak pigments from my palette.
You can read about the testing methodology on his website.
If you're doing watercolor or any other water-based paint test - prefer thicker paper. Ensure that your printer can handle the thickness, though.