Manufacturing Process Phase A: Prepare phase A and stir until dispersed. Phase B: Slowly add the water to phase A under stirring and stir until complete dissolution. If wanted, add heat-proof colour. Phase C: Prepare phase C, adjust the pH to 5.5 +_ 0.05 and set aside. Heat phase A+B to its boiling point and keep this temperature for 2 - 3 min. Add phase C to the hot phase A+B. Continue stirring until ehas not