adpack-C (VCI Impregnated Paper for Copper & Copper Alloy)
adpack-C is an impregnated type VCI (Volatile Corrosion Inhibitor) paper developed by ADCOAT CO., LTD. to protect copper and copper alloys from corrosion without altering their natural color. With over 50 years of expertise in VCI technology, ADCOAT ensures reliable performance for industries handling copper-based materials. This product has passed the JIS Z 0321 certification test.
Strengths of adpack-C:
- Passed JIS Z 0321 corrosion protection test.
- VCI vapors act quickly, penetrating fine details of machine parts.
- Continuous rust prevention through absorption on copper surfaces.
- No de-greasing required — products can be used immediately after unpacking.
- Protects copper and alloys without causing discoloration.
Recommended Usage:
- Ideal for copper and copper alloy products such as wires, plates, and tubes.
- Suitable for electronic components requiring clean, oil-free rust prevention.
- Recommended for phosphor bronze and brass, which are prone to corrosion.
- Perfect for companies in the copper materials industry seeking a reliable rustproof solution.
Compatibility Table between adpack-C with Metals

Please pay attention for galvanized products, because the effect maybe different depending on their surface treatment variations.
Criteria on choice
◎: Very effective
〇: Effective
- : No effect
×: No good (not recommended)
Available variants through PT. Minami:
Series | Form | Specifications | Rust-Proof |
adpack-C | ACK-6(M) | 60g acid-free Kraft paper for rust proof | 6-12 months |
ACK-6(M) | 60g acid-free Kraft paper for rust proof | 6-12 months |
The above corrosion-proof effective period are for reference only. Actual condition may varies.
for more details on this product, you can visit ADCOAT's website here: https://www.adpack.jp/en/product/adpack-c/
You can also download adpack®'s catalog here.