Apparatus needed
- Mixing tank
- Mixing stick
- Packaging containers
Chemicals required Measurement
- Water 1 Bucket
- Calgon 1/8 kg
- Black paste 200g
- Off white Calcium 15kg
- Formalin 3 table spoons
- Nitrosol 75kg
- Defoamer 100g
Procedure
- Pour half bucket of water into the mixing tank. Keep the remaining half aside for diluting the chemicals.
- Dissolve the calgon in little water, pour into mixing tank and then begin to mix.
- Dissolve the black paste in little water, pour not the mixing tank and continue to mix.
- gradually add the calcium as mixing continues.
- Add the defoamer and keep stirring.
- Add the formalin and keep stirring.
- Pour the Nitrosol in the remaining water, stir vigorously and pour into the mixing tank and keep stirring.
- After stirring for some time, package and your black board renovator is ready
