White paper and board with a velvety surface.
Ispira papers and boards are ideal for packaging, commercial printing, inserts and brochures.
Can be used without problems with the main printing systems: offset, blind embossing, hot foil stamping, thermography and screen printing. The use of digital technology, such as Xerography and ink-jet, must be tested in advance to check effectiveness. The surface features low microporosity, and consequently the inks do not dry by absorption of the vehicle. Polymerisation in offset printing on sheets is achieved by oxidation, therefore oxidising inks need to be used.
Excellent results have also been achieved with UV-dried inks. In screen printing, inks for plastic surfaces are recommended. We dissuade to use fluorescent inks. In addition, it is essential to control all the printing process variables, especially the fountain solution, which must be used in minimum dosages. Anti-setoff is useful, while low-pile delivery is required. Drying times depend on the ink load and to what extent the process variables are ensured, and can range from around 6-8 hours to over 12 hours.
Good results can be expected with all the main converting process: cutting, die cutting, scoring, folding, gluing and lining (substance 120 g/m2). Ispira’s special finish greatly reduces surface microporosity, making the paper inert to the normal hot melt glues used for making brochures. To overcome this characteristic, we recommend using a polyurethane (PUR) type of glue, which guarantees an excellent bond between the cover and the book block and a high degree of elasticity when opening the brochure.
Varnishing and plastic laminating must be assessed in advance. The varnishing, coated with an offset machine, is almost fully absorbed and therefore does not improve gloss or protection, therefore we suggest to use acrylic or UV-dried varnishes. The special soft surface finish may give rise to micro defects with plastic laminating, caused by incomplete adhesion of the film to the substrate.