Aurusin 4N is a gold electrolyte intended for bath plating, which deposits a uniform, shiny 4N color layer. 4N can be described as a salmon yellow with warm undertones and is a common color throughout South East Asia. Aurusin 4N is intended for decorative use. It is, therefore, designed for flash plating, allowing for a deposition thickness of up to 0.2 micron. This yellow gold plating solution is lead- and cadmium-free, despite being a traditional cyanide-based alkaline bath.