RE/Gen CC-45 is a concentrated, buffered sodium chlorate solution designed to economically and safely regenerate cupric chloride etching systems. The use of sodium chlorate versus chlorine gas as the regenerative oxidizer, provides several safety advantages; most important of which is the elimination of chlorine gas storage. Additionally, sodium chlorate final etching systems can be operated at comparable speeds while improving the undercut or etch factor, compared to traditional chlorine gas system. Being a concentrated liquid, CC-45 is easier to handle than dry sodium chlorate and was designed for replenishment systems which employ an ORP controller, specific gravity controller, and specific ion electrode.