In alkaline conditions, such as in kraft pulping, the triglycerides are completely saponified, and the free fatty acids and resin acids are dissolved, but sterols and some steryl esters and waxes do not form soluble soap
and tend to deposit and cause pitch problems.
Saponification (the formation of a soluble soap
through the reaction of an alkaline material and a fat soil) may occur.
NGL's ultrasonic cleaning technology uses an aqueous base and industrial soluble soaps
, which are diluted to a low percentage, making the process extremely environmentally friendly.