SC Grades
Super Calendered Papers
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The VIB SmoothTech steamshowers in the on-line calender are zone-controlled for even gloss and smoothness from the second measurement scanner after the on-line calender. This guarantees high efficiency in roll building and paper quality. In this sophisticated on-line process with many different applicators in use, it is of utmost importance to have intelligent control and integration in a unified concept. This permits the important factor of control of the surface moisture both at the start of and during the process. SC off-line The conventional higher quality grades SC A and SC A plus are produced with off-line calenders for magazines such as Stern, Bunte and Hörzu (German magazines). |
These medium-priced magazines need extra gloss for their advertisements and their high-quality photos of cars, bikes, scenery etc. In the paper machine, the SC web is dried down to a moisture content of approximately 2 - 3%. The necessity of good calendering requires that the moisture level in front of the moisture spray is uniform. To guarantee this, steamshowers with narrow zones, for example 50 mm, are used to control the initial moisture prior to the spray. An extra measurement scanner in front of the spray ensures the capability of controlling the process for both initial and surface moisture. The spray system with multi-row spray nozzles adds moisture of approximately 6 - 8% for a total moisture of 10 - 11%. Page |
