Instant type hydroxypropyl methylcellulose

1. The water content is too high, resulting in too low content, which is equivalent to reducing the concentration of the solution.
2. The viscosity is low, and some marked viscosity does not match the actual viscosity.
3. Stir even after adding the ingredients, otherwise it will be layered, thin at the top and thick at the bottom.
4. PH value of water: If the PH value of water is greater than 8, even if it is added under stirring, it will not form a viscous solution quickly. (But it will not be as slow as 20 hours). If the pH value of the water is less than 6.5, it can be stirred even after adding the materials. But it also requires a certain time for dissolving. This time is still related to the pH value. The lower the pH, the longer the time. It is recommended to add it in neutral water, and then adjust the pH value to alkaline, and it will quickly form a consistency. Of course, there is generally no need for special adjustments in actual use, and most other materials will automatically increase the pH value.