Common issues like peeling or blistering often originate not in the plating itself, but in the nekko – due to residual oil, oxides, or improper activation.

It sounds like you’re referring to (メッキの根っこ).

In electroplating, the “nekko” (root/base) refers to the substrate material beneath the plated layer. Proper surface preparation of the nekko determines adhesion, corrosion resistance, and longevity.