How can I easily prepare a ready-to-use film coating suspension?

Here is BIOGRUNDs step-by-step guide how to prepare a suspension. Please be aware that all parameters have to be adjust individually.

Equipment & Material Equipment: propeller stirrer, beaker Material: Water, AquaPolish

Here is a simple calculation for a suspension with for example 20 % solids content:

• AquaPolish® : 20 (%) 200g
• Water : 80 (%) 800g
• Total : 100 (%) 1000g

1. Positioning the stirrer and beaker
   Diameter of the stirrer should be one third of the vessels diameter. The stirrer should be placed centrally in the lower third of the beaker.
2. Creating a vortex
   As soon as the stirrer is in the right position, it can be started. Now it is important that the speed is high enough that a vortex is visible. Create a vortex without drawing too much air into the solution by adjusting an appropriate stirrer speed. It is important that the chosen stirrer has enough power and is usable for high viscosities.
3. Adding AquaPolish
   Add the total quantity of AquaPolish® quickly and gradually into the vortex. Flotation of powder must be avoided. Increase stirrer speed if necessary to obtain a vortex. The AquaPolish® should not be added to the suspension at once. Increasing the stirrer speed: The rotational speed has to be adjusted during the constant addition of AquaPolish® as the viscosity of the suspension increases due to the dissolving process.
4. Set timer for 45 minutes
   Allow the dispersion to be agitated gently for about 45 minutes. The resulted dispersion should be lump free. After 45 minutes of stirring the suspension is ready to use.
   Important: Continue stirring during the spray process!

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