The invention relates to a process to produce brine of improved purity wherein a salt source, contaminated with sulphate ions and alkaline metal ions, is dissolved in water in the presence of an effective amount of a retarding agent comprising at least one low and at least one high molecular weight retarding agent. The light guide plate has a first surface, an opposite second surface, a first side surface, and an opposite second side surface. The hinge mechanisms, cases which cover the folded air bags and actuators for raising the hood panel are provided sequentially in that order towards the front on the lateral side edge of the hood panel at the rear end thereof. These are the Arbitration state and the Data Transfer state. , optical or infrared sensing mechanisms. Based on threshold testing of two metrics that are measures of distance between the frames at the input, a frame may be assigned to be compressed as an I, P, or B frame or be skipped over by the system without being coded at all.