[OLDIES BUT GOODIES]
A dramatically... low cost penetrant.
From a marketing point of view, chemicals may be classified in three families : "Commodities", Chemical specialties, Fine chemicals.
So-called "commodities" are widely used chemicals, manufactured in impressive quantities (by thousands of tons sometimes) such as those sold in supermarkets (cleaners for dish-washers, for soils, etc...). Competition is harsh and, then, selling prices and margins (measured as a percentage of the price) are low. Do PT materials belong to this family ?