file box with rings

Made of 1.8mm corrugated cardboard.

Light gray exterior finish.

The materials comply with ISO9706 regulations.

paper base:

• 100% bleached cellulose (alpha cellulose).

• Without the usage of recycled fibers.

• Free of wooden fibers • Kappa level 1 – 2 = lignin - free.

• pH - value 8.0 – 9.5 = acid - free (in accordance with ISO 6588 -1:2005).

• Alkaline reserve (buffer) > 2% natural calcium carbonate (GCC).

• Sizing: neutral/synthetic (without alum additive).

• Without optical brighteners (OBA - free).

• Photographic Activity Test (PAT) passed in accordance with ISO 18916 : 200.

Glue used for Corrugated cardboard.

• Native potato starch.

• pH-value > 8.0.

• Glued moisture-proof (wet-strengthened).

On request they can be served with a cover.