regnbue-copyGlenn Fleishman, blogging (AND with this month’s cover story) at The Economist, describes what happens when California sunlight meets a dye from the 1950s on a Los Angeles t-shirt. An artist couple wanted graphics with true continuous tones and couldn’t get them from silkscreening. Many years, miles, and crowdfunding appeals later, they’ve perfected their process—and started a company.