Procedure:

• i) Wash the sieve with xylene and then with acetone. Place it in the dish, dry in the oven at 100 to 110°C for 1 hour, cool and weigh, together with the dish, to the nearest 0.01 g (W1).
• ii) Remove the sieve from the dish and moisten with the solution. Remove uniformly the 4-litre sample by gentle agitation and strain immediately through the sieve into the clean, dry, weighed container (W4).
• iii) Sieve the low and high viscosity emulsion at room temperature and 50°C respectively. When whole of the emulsion has been passed through the sieve, remove the sieve and weigh the container to the nearest 1g (W2).