sulphuration

from The Century Dictionary.

• noun The act of dressing or anointing with sulphur.
• noun The act or process of impregnating, combining, or fumigating with sulphur; specifically, the subjection of a substance, such as straw-plait, silks, and woolens, to the action of sulphur or its fumes for the purpose of bleaching; also, the state of being impregnated with sulphur. Also sulphurization, sulphurisation.

from the GNU version of the Collaborative International Dictionary of English.

• noun The act or process of combining or impregnating with sulphur or its compounds; also, the state of being so combined or impregnated.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun Alternative form of sulfuration.