How bad can efflorescence of soluble salts be?

Saturday 12th October 2013

Like this! This terra cotta clay vitrifies here at 1957F (cone 03). This problem is common in many terra cotta materials but can also surface in others. Barium carbonate can be used to precipitate the salts inside the clay matrix so they do not come to the surface on drying.

Pages that reference this post in the Digitalfire Reference Database:

Outdoor Weather Resistant Ceramics, The Use of Barium in Clay Bodies, Terra cotta, Soluble Salts, Sulfates, Sulphates, Efflorescence

This post is one of thousands found in the Digitalfire Reference Database. Most are part of a timeline maintained by Tony Hansen. You can search that timeline on the home page of