Orton Pyrometric Cone – 08 Large – Pair

Description

LARGE CONES: require mounting in a commercial cone plaque, clay pat or wire cone holder before use. Mounting height and angle are critical for consistent results.

SEPARATING CONE PAIRS: Cones are formed in pairs and can be separated by grasping by the base and gently twisting along parting line.

USE OF CONES: Cones are used to witness the heatwork applied to ceramic ware by a kiln. Common practice is to use multiple sets of three consecutively numbered cones placed strategically throughout the ware setting to cover a wide temperature range. The first cone in the series is called the guide cone, the second is the firing cone, and the last is the Guard cone. A cone will bend when it is heated to within a time and temperature heating profile. A bending difference of one cone or less throughout a kiln indicates good firing practice. Interpretation of the cones bending point is of considerable aid for making improvements to firing conditions and checking the repeatability and uniformity of a kiln.

*Contains Red Iron Oxide