Ribbon-bound covers

A classic archival storage product for documents.  
Note: We can produce ribbon-bound covers with paper flaps at a client's request.
The flaps provide additional protection.

• Siena cardboard:
  - ISO 16245 type B certificate
  - colour: greyish-brown
  - pH > 7.5
  - alkaline reserve > 0,4 mol/kg
  - water absorbency:  Cobb60 < 25 g/m2
  - no dye migration
  - no optical brighteners
  - grammage: 1100 g/m2

• Ribbon:
  - width: 10 mm
  - 100% cotton cellulose
  - fibres are not chemically bleached 
  - fibres are not of recycled origin 
  - natural white
  - neutral pH 
  - herringbone weave