Ni-Pd free all-purpose master alloy for 375-585‰ (9-14 Kt) white gold

NPF301 is a Proderma nickel-free, palladium-free master alloy for 375‰ (9 Kt) white gold jewelry, designed as an all-purpose formulation.
NPF301 is suitable for continuous casting and for ingot casting of semi-finished items such as sheet, wire, tube. The alloy can also be used for lost-wax casting in closed systems.
The color of 375‰ gold made using NPF301 shows a premium white color grade (Yellow index: 17.4). In 375‰ title it is not necessary to proceed with rhodium plating deposition on surface in order to ensure maximum whiteness on the final jewel.
Although compatible with 585‰ production from the processing point of view, the color of NPF301 in 585‰ gold has a greenish tinge that makes rhodium plating depositions mandatory in 585‰ title.
The hardness of 375‰ gold alloyed with NPF301 can be increased by means of a heat treatment.
NPF301 has a minimum level of deoxidizers, this makes it suitable for casting in closed systems.