Original sentence: CAPS was the first digital ink-and-paint system used in animated feature films, designed to replace the expensive process of transferring animated drawings to cels using India ink or xerographic technology, and painting the reverse sides of the cels with gouache paint
Edited sentence: CAPS was the first digital ink and paint  system used in animated feature films, designed to replace the expensive process of transferring animated drawings to cels using India ink or xerographic technology, and painting the reverse sides of the cels with gouache paint