Film coating can protect the tablet from light, temperature and moisture, mask undesirable taste or odor, improve the appearance, provide tablet identity, facilitate swallowing and control or modify the release of the drug 12. Tablet film coating is performed by two types, one is aqueous film coating generally water is. Caffeine 65mg tablets have produced by standard procedure. Film coatings can be applied by different methods, such as spraying a liquid, dipping into a liquid, precipitating from supercritical fluids or depositing a powder using an electrostatic technique. This is why the glossiest coatings are not suitable for twosided worknturn jobs, but work well for onesided jobs. A tablet film coating model for aqueous andor organicbased systems is shown to predict exhaust stream conditions thereby facilitating process optimization and scaleup. Aqueous film coating is applied as a thin polymeric film to the surface of a tablet. Coating drying speed film thickness of coating aqueous coatings have a tradeoff between dry speed and gloss. This guide is intended as an aid to help you solve problems in the pressroom with aqueous coatings. Wide difference in stock,like sbs board very absorptive to foil nonabsorptive. The processing time for any film coating application is extremely important to meet production goals. The aqueous coating products being sold today are vastly improved from those of even a few years ago, but the process of applying a waterbased coating over wet litho ink must be understood.
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