When not yet opening/3 years after the packing up/the 6 to 12 month (at the polyethylene bag together it seals up packs up the 12 to 36 month)
High Vapor Inhibitor Ability for iron Passed JIS Z-1535(Vapor Inhibitor Paper).
60g craft for anti rust
It cannot be used on zinc or copper because it has negative effects.
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.