— A petroleum distillate
solvent, 5% boiling between 90 and 100°C (194 and 212°F)
and 90% distilling below 210°C (410°F), shall be used. Percent
may be determined by mass or by volume. These solvents are
available from most chemical companies under the name of
stoddard solvent or ligroine. (Warning—Flammable. Vapor
harmful.)