50 mm, in case of heat treatment in accordance with point 2(a); or
30 mm, in case of heat treatment in accordance with point 2(b).
They must then be mixed with formic acid to reduce and maintain the pH to 4,0 or lower. The mixture must be stored for at least 24 hours pending further treatment.
a core temperature of at least 90 °C for at least 60 minutes; or
a core temperature of at least 70 °C for at least 60 minutes.
When using a continuous flow system, the progression of the product through the heat converter must be controlled by means of mechanical commands limiting its displacement in such way that at the end of the heat treatment operation the product has undergone a cycle which is sufficient in both time and temperature.