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Field metallography is a non destructive inspection technique that is helpful in determining the microstructural of the area of work. The procedure is done out in the field without removal of the sample. Field metallography begins with the very rough grinding of the selected area, usually with a 60 grit abrasive. Thick scale and rust must be removed over an area larger than the ultimate spot. Each area worked should be smaller than that worked in the previous step. This reduces the opportunity of dragging large particles across the prepared area. After rough grinding, there is a sequence of fine grinding steps. The use of an etchant after polishing is often required to bring out the relevant microstructure.

Analysis and documentation are the final steps in field metallography. This can be achieved with either the Provil novo method or the Cellulose acetate tape. The equipment used in field metallography is very diverse. For rough grinding, right angle grinders or portable belt sanders are popular. Fine grinding and polishing can be accomplished with variable speed drills or "Dremel" tools.

Cellulose acetate is one of the products that is used to preform a replica of a structure.

REPLICA TAPE    Acetate base.