In the early nineties Chase much of his time developing new ideas in his color photography. With the closing of the Minchner-Wilcox Gallery, where he had been showing since the early nineties, he began to be represented by the Christopher Grimes Gallery, Santa Monica. Painting consisted of returning to earlier pieces and reworking them. Chase also began his first artist books, single additions of painted works, which occupied the rest of his time. In 1992 he created a series of three-dimensional boxes inspired by the work he was doing with books. Ronald's paintings returned to the built patterns of the earlier work.     By the middle of the nineties Chase's works were taking between three and five years to complete, sometimes longer. Often works of ten years ealier would be reworked. His interest in the decay of things, weathering, the corrosion of urban life gave the patinas almost a crusted look. Chase had also created and was running the San Francisco Art & Film Program for Teenagers, which with his other activities, took much of his time. The paintings involved canvases bolted together or arranged in stacks, two or three deep on the surface of a work.     Toward the end of the nineties, Chase concentrated on paper work, returning to his love of collage.