Now about transparent/not transparent colors
Let me show you the difference
Pigments with dioxide titanium are not transparent
They heal by the more visible result and looks more like a lipstick
This color is not transparent - with a lot of dioxide titanium
And this one is darker but more transparent, after healing this color will look more natural than then the first one.
You can do both techniques (transparent or not) but for one type of skin, transparent pigment heals more naturally and not transparent will look like a lipstick and more visible.
Examples of transparent pigments and transparent techniques for lips, all works are healed
And this work with not transparent pigment which included more dioxide titanium
You see color after healing is more visible
Compare two colors
Left one rich of dioxide titanium and not transparent.