Aqueous film coating pdf

Many modifications were advocated to improve the basic process and film coating chosen in place of sugar coating and after that, the researchers were moved towards to the organic solvent based coating to overcome problem occurred with sugar coating. Affect of the coating process on tablet properties has been. Often we tend to think of aqueous coatings are requiring longer processing times than organic solvent systems. The processing time for any film coating application is extremely important to meet production goals. Caffeine 65mg tablets have produced by standard procedure. By using two aqueous film coating formulations, the uncoated tablets have been tested for the suitability of the coating process.

Another critical element in any comparison between aqueous and organic film coating systems has to relate to time. This guide is intended as an aid to help you solve problems in the pressroom with aqueous coatings. This is why the glossiest coatings are not suitable for twosided worknturn jobs, but work well for onesided jobs. 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. 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. A tablet film coating model for aqueous andor organicbased systems is shown to predict exhaust stream conditions thereby facilitating process optimization and scaleup. Lirong liu, in developing solid oral dosage forms, 2009. Pdf a thermodynamic model for organic and aqueous tablet. The journal publishes original and highquality research papers in all areas of. Wide difference in stock,like sbs board very absorptive to foil nonabsorptive.