Cosmetics Formulation Development

I want to know which surfactants Coal Tar Solution can dissolve best with.

Initially, I tried to dissolve it with vg by heating the vg and then dropping in Coal Tar Solution and stirring, but the dissolution seemed not good and some black precipitates formed.

hello

Can be added to most shampoo bases.

Prepare the shampoo base until complete, then add Coal Tar Solution, stirring continuously until combined.