It cannot be used on zinc or copper because it has negative effects.
Unopened / 3 years After packing/12-36 months
75g craft for antirust
The rust-preventive side of vaporability antirust paper is carried out inside, and the sealed package of the subject is carried out, or please let the vaporability antirust paper of the same area as the surface area of a subject coexist in the sealed space.
High Vapor Inhibitor Ability for iron Passed JIS Z-1535(Vapor Inhibitor Paper).