sign on, 1  to employ; hire. 2  to bind oneself to work, as by signing a contract: He signed on as a pitcher with a major-league team. 3  to start radio or television broadcasting, especially at the beginning of the day. 4  Computers. log1 (def 17a).
FROM FIBER TO FABRIC: ACETATE INTRODUCTION Initially invented in Europe as a varnish for airplane wings, acetate was first produced in the United States in 1924 making it the second oldest manufactured fiber.
Acetate yarn or thread has a silk like appearance, resists wrinkles and fading, and is low cost; used for dress and coat linings, blouses, lingerie, and shoe linings. Acetate can shine from pressing and may snag easily. Acetate or triacetate is also further identified as acetate rayon or just rayon or viscose rayon.