I. Three Core Functions of Magnesium Stearate

1.

The lubricating effect (most important) reduces the friction between the granules and the die, and between the granules themselves, allowing for smooth tableting, preventing die blockage, sticking to the die, and easy tablet ejection.

2.

3.

The anti-sticking effect forms a hydrophobic film on the surface of the punch, preventing material from sticking to the punch.

4.

5.

The flow-enhancing effect (minor) improves fluidity and makes the tablet weight more stable.

6.

II. Correct Usage (High-Speed Machine Standard)

1. Dosage range

· Normal particle size: 0.3%–0.8%

· High in fine powder, poor compressibility: 0.1%～0.3%

· High-speed machines and easily damaged films: Keep the quantity as low as possible.

Remember: The finer the powder, the less you need to use.

2. How to join

Make sure to join last ! Process:

1. Mix the main ingredients and auxiliary ingredients evenly first.

2. Finally, add magnesium stearate.

3. Mix for another 3-5 minutes .

3. Mixing time

· Do not leave it for too long! If it exceeds 10 minutes, it is easy to over-lubricate and cause a sharp drop in hardness .

· For ingredients with a lot of fine powder, mixing for 3 minutes is enough .

III. Most importantly: The difference between having more and having less.

1) Too little dosage

· Adhesion, scratches, and roughness

· The mold is not properly sealed, and the film output is not smooth.

· Large fluctuations in film weight

· The film has many rough edges.

2) Using too much will make the tablets soft and unable to achieve the desired firmness.

· Adding main pressure didn't work.

· The weight is very stable, but it's just loose.

· The more you press, the softer it becomes.

· Non-stick punching, no mold clogging

IV. High-speed machine + materials with a high content of fine powder: the golden usage

1. The dosage is too low: 0.1%–0.3%

2. Add last and mix briefly (3-5 minutes).

3. It's better to add less, and add more if needed.

4. If sticking occurs, try adding only 0.05% to 0.1%.

5. Do not add all at once.

V. A summary in one sentence

Magnesium stearate is a lubricant; more is not necessarily better. Too little will cause sticking and too much will cause loose flakes. The more fine powder, the more sensitive the machine will be. High-speed machines must add less and mix for a shorter time.