Dr. Herbert Sinner, former head of tenside chemistry at Henkel in Germany, recognised already at the end of the nineteen-fifties that there are in total four factors that significantly affect the cleaning result.
The so-called Sinner Circle that was developed by him indicates that the factors time, temperature, mechanics and chemistry are in close interdependence.
- In order to lower the cost-relevant factors of time (production stoppage) and temperature (energy costs),
we need to pay attention to the factor chemistry, since the mechanics factor is only variable to a slight extent.
- This is not just a matter of purely increasing the quantity or concentration of the cleaning chemicals,
but above all it is a question of selecting one or a combination of more cleaning chemicals that are tailored to the contamination profile.