Mixing

Risograph Barcycentric Atlas cover on a wooden table surface
Aqua, Fluorescent Pink, and Sunflower colors overprinting on a barycentric grid pattern
Blue, Pink, and Crimson colors overprinting on a barycentric grid pattern
Aqua, Fluorescent Pink and Fluorescent Orange colors overprinting on a barycentric grid pattern

It’s been a while since I’ve added a new color swatches book/project to my collection and Daniel Mellis’ Risograph Barycentric Color Atlas is a doozy as it visually explores color mixing across twenty-four sets of 3-color combinations comprised of 13 ink colors on the Risograph.

This approach really does a good job of showing off how Riso inks mix, and Daniel’s unusual book format also demonstrates printing on larger sheets than are commonly used with the Riso.

I also discovered he’s designed and produces a pretty cool bookbinding signature punch tool.

I wasn’t familiar with barycentric coordinates, and luckily Daniel offers a very simple explanation on the project page for the book: …taking one unit of mass and distributing it on the corners of the triangle. The point on which the triangle will balance is the center of mass, or the barycenter.