TY - JOUR AB - In this paper the properties of printed circuit etchants are reviewed with reference to the development of control systems. Various types of control systems are described together with their application to the control of ammoniacal etchants. VL - 3 IS - 1 SN - 0305-6120 DO - 10.1108/eb043547 UR - https://doi.org/10.1108/eb043547 AU - Morris R.E. PY - 1976 Y1 - 1976/01/01 TI - The Use and Control of Ammoniacal Etchants T2 - Circuit World PB - MCB UP Ltd SP - 51 EP - 52 Y2 - 2024/04/26 ER -