How many types of tablet coating are there?

- Tuesday, May 21, 2019

The coating is coated with a suitable material on the surface of the tablet.

Types of Tablet Coating

Sugar coating and film coating. The film coating is divided into stomach-soluble, enteric-soluble and water-insoluble, the process can be completed by the film coating equipment.

tablet coating

The purpose of tablet coating:

1. Control the release site of the drug in the gastrointestinal tract. For example, a drug that is unstable in gastric acid or stomach enzyme (or a drug that is highly irritating to the stomach) can be made into an enteric coated tablet, which is coated with an enteric coating. The membrane begins to dissolve in the small intestine, so that the drug is released in the small intestine, avoiding the damage of the stomach acid and stomach enzymes.

2. Control the release rate of the drug in the gastrointestinal tract. For example, a drug having a short half-life is formed into a core, and then coated with a suitable polymer film-forming material. By adjusting the thickness and permeability of the coating film, it can control the drug release rate to achieve sustained release, controlled release and long-term effects.

3. Cover up bitterness or bad smell. For example, berberine is bitter after the entrance. But after it is packaged into sugar-coated tablets, it can cover up its bitter taste, and it is convenient to take.

4. Protect the air from moisture and light to increase the stability of the drug. There are some drugs which are very easy to absorb moisture. After coating with a polymer material such as hydroxypropyl methylcellulose (HPMC), the tablet can effectively prevent moisture absorption and deterioration.

5. Prevent changes in the compatibility of drugs. For example, the operator can separately granulate, coat, and compress the two drugs to minimize direct contact between the two.

6. Improve the appearance of the tablet. Some drugs have a poor appearance when they are made into tablets (especially tablets of Chinese herbal medicine), and the appearance of the tablets can be significantly improved after coating.

The Best Tablet Coating Solution - Tablet Coater


What is a tablet coating machine? It is a device that applies a thin coating to the surface of tablets. The coating can be used to improve the appearance, taste, and stability of the tablets, or to control the release of the active ingredient.


There are several different types of tablet coating machines, but they all work on the same basic principle. The tablets are first sprayed with a solution of the coating material. The solvent in the solution evaporates, leaving a thin film of coating on the surface of the tablets. The tablets are then dried in a heated chamber.


The type of coating material used, the thickness of the coating, and the drying conditions can all be varied to achieve the desired results. Tablet coating machines are used in a variety of industries, including pharmaceuticals, food, and cosmetics.


Here are some of the benefits of using a tablet coating machine:


  • Improved appearance: The coating can be used to make the tablets look more attractive and appealing.
  • Improved taste: The coating can be used to mask the taste of unpleasant ingredients.
  • Improved stability: The coating can help to protect the tablets from moisture, light, and other environmental factors.
  • Controlled release: The coating can be used to control the release of the active ingredient in the tablet. This can be useful for drugs that need to be released slowly over time.


If you are considering using a tablet coating machine, it is important to consult with a qualified engineer to ensure that you choose the right machine for your needs.



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