Helen Frankenthaler's What Red Lines Can Do is a vibrant screenprint in colors that investigates the expressive and structural potential of linear elements within abstract composition. Produced in 1970, this work demonstrates the artist's command of color relationships and gestural mark making translated into printmaking media. The title directly addresses the formal investigation, suggesting both the visual and conceptual possibilities of a seemingly simple element. The bold use of red alongside complementary colors creates dynamic spatial tensions and visual movement across the surface. As a limited edition of 75, this print represents an important extension of Frankenthaler's abstract aesthetic into the realm of printmaking.