Specifies essential requirements for the satisfactory microfilming of engineering drawings and other documents onto 35 mm film using either roll film or camera cards. The specified reduction ratios 30x, 21.2x and 15x agree with the ISO Recommendation. The Standard is designed around the use of drawing sheets complying with AS 1100, Part 101 but provision is also made for large drawings and sheets complying with other Standards. For a basic guide to microfilming see MP 25.