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.
Acetone can also be used to remove water from glassware in the laboratory. And it is a major component of some nail polish removers. The most common use of acetone is to formulate other chemicals. Formulation and production of other chemicals can account for up to 75 percent of all uses of acetone.Acetone is used in the manufacture of methyl methacrylate (MMA) and bisphenol-A (BPA).nd it is a major component of some nail polish removers. The most common use of acetone is to formulate other chemicals. Formulation and production of other chemicals can account for up to 75 percent of all uses of acetone. Acetone is used in the manufacture of methyl methacrylate (MMA) and bisphenol-A (BPA).