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dissolution

Posted On December 5, 2008 0 Comments
Action of a solvent material on a solid, bringing it into liquid solution. Source: Clay: A Studio Handbook

dispersoids

Posted On December 5, 2008 0 Comments
In glaze-melt, inclusions that disperse throughout the melt without actually dissolving into the glassy-phase. Source: Clay: A Studio Handbook

dispersion

Posted On December 5, 2008 0 Comments
Natural tendency of materials in liquid solution to go from area of high concentration to area of lower concentration, resulting in even distribution of materials throughout the glaze melt. Source: Clay: A Studio Handbook

devitrification

Posted On December 5, 2008 0 Comments
The phenomenon that occurs early in the glaze cooling cycle, when certain materials crystallize out of the vitrified (fused) mass. Source: Clay: A Studio Handbook

deposited clays; sedimentary clays; secondary clays

Posted On December 5, 2008 0 Comments
Clays that have been transported away from their point of geologic origins by wind or water. 

deflocculate; deflocculation

Posted On December 5, 2008 0 Comments
Process of adding an alkaline (usually) material (deflocculant) to a suspension, which introduces like electrical charges to all particles, causing them repel one another and remain in suspension. 

deairing

Posted On December 5, 2008 0 Comments
The process of removing the air from a plastic clay mass, usually accomplished through wedging, or far more effectively with a vacuum deairing pugmill.  Source: Clay: A Studio Handbook

Darvan

Posted On December 5, 2008 0 Comments
Common deflocculant for casting slips. Product of R.T. Vanderbilt Company. Source: Clay: A Studio Handbook

damper

Posted On December 5, 2008 0 Comments
In fuel-burning kilns, adjustable refractory plate located in exhaust flue, allowing control of back-pressure and secondary air, regulating kiln atmosphere. Source: Clay: A Studio Handbook

damp cabinet

Posted On December 5, 2008 0 Comments
(also damp box, damp closet, damp room) A reasonably airtight cabinet or room in which damp ceramic forms can be stored temporarily to slowly dry, protected from harmful air currents.