Method of dissolving contaminants from substrates by using hydrofluorocarbon solvents having a portion which is fluorocarbon and the remaining portion is hydrocarbon

A method of dissolving contaminants or removing contaminants from the surface of a substrate selected from the group consisting of organic or inorganic surfaces or natural or synthetic fabrics and blends or composites thereof which comprises the step of:

• exposing said substrate to at least one solvent of the:
• (A) Formula (I)
• C.sub.n F.sub.2n+1 C.sub.m H.sub.2m+1
• wherein n is 2, 3, or 4 and m is 2 or 3;
• (B) Formula (II) ##STR4## wherein R.sup.1 is the same or different and is selected from the group consisting of --CH.sub.3 and --C.sub.2 H.sub.5 and R.sup.2 is selected from the group consisting of --CH.sub.3, --CH.sub.2 CH.sub.3, --(CF.sub.2).sub.2 CF.sub.3, and --FC(CF.sub.3).sub.2 ;
• or
• (C) Formula (III) ##STR5## wherein R.sup.3 is the same or different and is selected from the group consisting of --CF.sub.3, --C.sub.2 F.sub.5, and --C.sub.3 F.sub.7 and R.sup.4 is selected from the group consisting of --CH.sub.3 and --C.sub.2 H.sub.5 with the proviso that both of R.sup.3 cannot be --CF.sub.3.