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.
Definition: Acetate is a manufactured fiber in which the fiber-forming substance is cellulose acetate. Where not less than 92% of the hydroxyl groups are acetylated, the term triacetate may be used as a generic description of the fiber (Source-Textile Fiber Products Identification Act, Federal Trade Commission).cetate was the second manufactured fiber to be developed. 1  Acetate and triacetate are modified cellulosic fibers also known as derivative cellulosic fibers. 2  They are produced by acetylation (replacing the hydroxyl groups with acetyl groups) of the cellulose molecule.