Usually records are kept in 16 mm films. During the process of microfilming, the original document is reduced to about one-thirtieth of its area. After microfilming, the documents are read with the help of viewers. The advantages of microfilming are:
(a) It saves utilisation of floor space.
(b) It allows saving in office stationery and overhead expenditure.
(c) It ensures security and safety of documents.
(d) The microfilms records are more durable.