3.4.1 Manufacturing: Nylon 6, 6 is a linear condensation polymer made from hexamethylene diamine and adipic acid. Specific amounts of the two chemicals are combined in solution to form nylon salt. This salt is purified, polymerized, extruded in ribbon form, and chipped into small flakes or pellets. These flakes or pellets are melted and extruded through a spinneret into cool air and the nylon filaments are formed.

4. Bell pin: Use of pins for basting and fixing of pattern pieces to the fabric makes work easier, quicker and more accurate. Select sharp thin medium lengthy pins that will not leave pin marks, on all types of fabrics.