Novo test paper – wood-free
Lignin-free (wood-free) test paper recommended for paper deacidification, or for testing the "Effectiveness of paper deacidification processes” using a test paper according to ISO/TS 18344/DIN 32701.
Specifications for lignin-free paper
- Fibre material (pulp) containing at least 65% bleached sulfite pulp (hard wood or softwood) with hemicelluloses, can contain up to 35% of a different bleached fibre material (e.g. kraft pulp)
- Filling material 10% – 15% kaolin (china clay)
- Area density 80 gsm
- No surface treatment, machine finish
- Sizing according to Cobb 60s 20 ± 2 gsm
- Stock sizing with resin alum
- No surface sizing
- No optical brightening agents
- Acid content, specified as negative alkaline reserve -0.3 ± 0.1 Ma-% MgCO3
- No specification is made for the pH of the extract; this must be determined and documented after production
