When Lyle Ashton Harris’ grandfather passed away, he and his brother inherited a vast trove of over 10,000 Ektachrome slides documenting his day-to-day life. Developed in the early 1940s, the film is a brand name from Kodak, and was a new type of color technology when their grandfather adopted it. (Instead of adding color to black-and-white images during processing, as is done with Kodachrome, this film allowed people to take images directly in color.)