Transfer it into the mortar and pestle and grind, untill it's well mixed.
Now comes the part were you need to take precaution, weigh out:
- 7g Zinc powder
Put it in the mortar and pestle and grind it together with the other ingredients.
Care must be taken at this point, not to let any water near this stage, since the powder is now finished and ready to use. Use it instantly, as storing the mixture will guarantee problems.