Metalloy® gold plating processes include Metalloy® AG-240 acidic gold plating process, Metalloy® AG-100 neutral gold plating process, and Metalloy® AP series gold plating process. Therein Metalloy® AG-240 acidic gold plating process can obtain 24 karat gold deposits with the addition of cobalt component as brightener, and is often applied in both rack plating procee and barrrel plating process. Metalloy® AG-100 neutral gold plating process can obtain pure gold deposits and is used mainly for manufacturing jewelries and decoratives. Metalloy® AP series gold plating processes consist of basic additives and color matching agents. Metalloy® AP series gold plating process can obtain gold deposits with different hues, such as light whited gold, blue gold, rose gold, and champagne gold.