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.
flashfilm/Photodisc/Getty Images. Acetate fabrics are made with spun filaments of cellulose taken from wood pulp. Classified as a chemical fiber textile or semi-synthetic, acetate is sometimes mixed with silk, wool or cotton to make it stronger.Acetate flakes are generated by a reaction of the wood pulp to a variety of acetic acids.lassified as a chemical fiber textile or semi-synthetic, acetate is sometimes mixed with silk, wool or cotton to make it stronger. Acetate flakes are generated by a reaction of the wood pulp to a variety of acetic acids.