Perma-Wet
A urethane material which is used to simulate wet areas on flexible masks or props. Perma-wet is extremely flexible and stretches with the product, instead of cracking.

Positive
Any sculpture or model used as a pattern for a negative mold.

Reference Material
Any visual information used as an aid in creating a sculpture, etc.

Resin
Any of a large class of synthetic products that have some of the physical properties of natural resins but are different chemically and used chiefly in plastics.

Shading
A painted-on shadow which is applied to recessed areas on masks and props to deepen a relief effect.

Silicone
An elastomer material used to make flexible rubber molds.

Special Effects
A term used to decribe special theatrical make-up effects, as well as other theatrical and film effects. Often abbreviated as SPFX or F/X.

SPFX
An abbreviation of the term "Special Effects". See Special Effects.

Steel Palette
A piece of thin, flexible sheet metal which is used to scrape a clay surface. Removes surface irregularities and helps in creating a smooth surface.

Surgical Adhesive
A strong non-toxic glue which has the ability to bind to human skin, such as Duo, used by the effects industry to attach Appliance Make-Up components.

Texture Stamp
A flexible stamp made from latex or flexible urethane. Texture Stamps are pressed onto a clay sculpture to impart texture and detail.

Ultra Cal
An industrial stone pattern material adapted from the tool and die industry. Used to create very hard, long lasting molds.

Undercut
Any positive or negative area which creates a lock situation between the mold and casting. Undercuts are the main reason why mold makers usually select a soft moldmaking compound such as silicone to cast rigid materials.