But this “trace” is not the conclusion of the saponification. Rather only about 90% of the saponification process has been achieved at trace stage.
In cold process soap making, saponification is not completed until after you’ve cut your soap bars and left them out to cure.
Thick trace as shown here with a consistency of pudding is best used for layered soaps, but you must work quickly. Lighter trace is more like cake batter- light trace to be covered in another post. I’ll link here once complete.