Information of materials that we use.
What is thin print paper?
- Totally wood free paper based on 100 % chemical pulp. In chemical pulp length of wood fibers is maximized, which means strength and durability.
- Manufacturing process does not require energy consuming grinding of mechanical fibers.
- Coated and uncoated, white and cream grades. Basis weights 25–40 g/m².
- High whiteness enables extremely high print contrast and easy readability.
- High opacity created by special fillers diminishing possible print through.
- Durability when archived caused by natural chemical pulp.
What kinds of glues are used for perfect binding? What are the differences between different kinds of glues?
Types of adhesives and how they work:
Polyurethane (PUR) hot melt adhesive (Reactive hot melt adhesive)
- Thickness of glue film 0,3 mm
- Excellent heat and cold stability
- Excellent solvent resistance
- Very durable (strongest possible option, commonly utilized as more economical option instead of thread sewing)
- For bookbinding with high technical requirements (most printing houses are not capable to work with PUR)
- Good unfolding characteristics
Conventional hot melt adhesives
- Thickness of glue film 0,7 mm
- Negative spine rounding may occur (worse unfolding characteristics than with PUR adhesive)
- Ease of use
- Good penetration into paper
- Good heat resistance
Why to use hot melt adhesives?
- High tack and fast setting
- 100 % solid material (no waste material)
- Gap filling properties (even firm spine)