SC Grades
Super Calendered Papers
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SC on-line SC grades, SC A and SC B, are uncoated high-quality magazine papers. Depending on the quality, they have different furnish and ash content. They are used in a color printing press with high throughput and quality. Today, the lower quality is produced with on-line soft calenders or for higher gloss with on-line multinip calenders. SC on-line is used for low cost magazines, such as TV guides, for example the German TVdirekt, and a variety of magazines as pictured. This on-line SC B and lower type of SC A grades are made with an extensive spray with micro droplets; the VIB AirTechPlus 6 is applied just upstream of the on-line calender to control an even moisture level for optimum calendering with high gloss and smoothness. |
The moisture in front of the micro droplet spray must be controlled to a specific level. There are typically one or two VIB SteamTech steamshowers in the press section to control the moisture level in front of the spray. The control of the steamshower together with the spray should be decoupled with an intelligent control algorithm. This is required because of the single measurement scanner in front of the on-line calender. Page 1 of 3 |
