[Terminology] Krafft point and cloud point
Krafft point
Definition: the temperature solubility of ionic surfactant rapidly increasing.
Typically, to ionic surfactants, krafft point is present.
Cloud point
Definition: the temperature that solution of non-ionic surfactant appears cloudy and separates surfactant out.
Parts of non-ionic surfactants, such as: alkyl glycosides, do not have a cloud point.