titanium dioxide kaolin talc and mica the phrase u201c pigmentary base u201d as used herein refers to the pigment that has not been treated with an organosulfonic compound preferably titanium dioxide is the chosen pigmentary base when the pigmentary base is titanium dioxide the titanium dioxide may be either rutile produced by either the sulfate or chloride process or anatase produced by the sulfate process the processes for making rutile and anatase pigments are well known to persons skilled in the art the organosulfonic compounds of the present invention may have hydrocarbon groups from about 2 to about 22 carbon atoms some examples of hydrocarbon groups useful in the present invention include ethyl propyl butyl isobutyl tertiary butyl pentyl hexyl heptyl octyl 2 ethyhexyl decyl dodecyl and the like preferably the hydrocarbon group is a linear hexyl a linear octyl or 2 ethylhexyl in order to prepare the treated pigment of the present invention the pigmentary base is treated with an organosulfonic compound that may in general be represented by formula i which includes not only organosulfonic acids but also their salts these organosulfonic compounds of formula i may be synthesized de novo or obtained from commercial sources such as aldrich chemical and sanwa chemical the phrase u201c organosulfonic compound u201d refers to organosulfonic acids and the salts of organosulfonic acids for compounds that may be represented by formula i preferably r will be hexyl octyl or 2 ethyhexyl formula i is where r represents a saturated unsaturated branched linear or cyclic organic group having from 2 to 22 carbon atoms x equals 1 2 3 or 4 and m represents hydrogen a metal ion ammonium ion or organoammonium ion such as protonated triethanolamine preferably if m is a metal ion it is.