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.
What is Acetate? Cellulose acetate is a plant-based plastic that is hypoallergenic. This material was first used for eyewear in the late 1940âs because of brittleness and other problems with previously used plastics. Todayâs acetates are known for being strong, lightweight, and flexible.ellulose acetate is a non-petroleum based plastic that is made from natural cotton and wood fibers. While petroleum products can be more expensive and harmful to the environment, cellulose acetate is made from renewable materials.