impastation

from The Century Dictionary.

• noun The act of impasting or making into paste.
• noun That which is made into paste; especially, a combination of various materials of different colors and consistencies, baked or united by a cement and hardened by the air: used of works in earthenware, porcelain, imitation of marble, etc.

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

• noun The act of making into paste; that which is formed into a paste or mixture; specifically, a combination of different substances by means of cements.

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

• noun The act of making into paste.
• noun That which is formed into a paste or mixture; specifically, a combination of different substances by means of cements.