When Thermal Diffusion Process Ni-Top is manufactured, it is covered with its coating layer which prevents rust.

Types / Test Items	Thermal Diffusion Process Ni-Top	As nickel plated
Copper sulfate (5%) solution Immersion Liquid temperature of 35 degree centigrade Immersed for 10 seconds 7 mm Eriksen Sponson

* 0.25 mm sheet thickness, 3 µm plating thickness

Elongation	0%	10%	20%	25%
Thermal Diffusion Process Ni-Top
As nickel plated

* 3 µm plating thickness JIS Z 2371 5% saltwater at 35 degree centigrade for 2 hours, tensile test distortion added (JIS specimen #5)