Coating Station
Coated paper or gloss paper is paper that has been coated by a mixture of materials or a polymer to impart certain qualities to the paper, including weight, surface gloss, smoothness, or reduced ink absorbency. Various materials, including kaolinite, calcium carbonate, bentonite, and talc, can be used to coat paper for high-quality printing used in the packaging industry and in magazines.
The chalk or china clay is bound to the paper with synthetic as well as natural organic binders. The coating formulation may also contain chemical additives as dispersants, resins, etc give water resistance and wet strength to the paper.
Offline Coating
Chromo Paper and Board: This Paper or Board is mainly coated on one side of Bleached Base Paper of various GSM. Coating gives high printing resolution, basically meant for one side coating on which printing takes place. Mostly this paper coating is done on Offline Coater.
Art Paper and Board: This Paper or Board is coated on Both side of Bleached Base Paper of various GSM. This is used for Glossy Magazines, and high end Paper like visiting card, invitation cards, calendars and brochures etc. Mostly this paper coating is done on Offline Coater. These paper grades are triple coated with 20–40 g/m2/side and have matte or glossy finish.
- Air Knife: Air knife is a non-contact type of scrapper which remove the excess chemical and gives uniform coating on paper but unable to fill hills and valleys of Paper. Mainly used for Low GSM Base Paper.
- Blade- Bar Coater: Scrapping done by Blade is best as it maintains a perfect clearance between paper and blade hence all hills and valleys are filled with chemical hence you get the best gloss on Paper. This unit is most preferred
- Curtain Coater: Coating chemical film falls on running Paper and full chemical is utilized. Highly sophisticated and used for high speed operation. With one unit three different chemicals can be applied. Coating thickness is uniform but there is no evening effect if paper is uneven. Used for lower GSM well calendared Paper.