|Monthly Tech-Tip |
This is a cone 6 transparent base glaze. It contains frit, silica, kaolin, wollastonite. Almost all glazes have materials that are slightly soluble and over time these can form scale on the sides of the bucket or even precipitate particles into the slurry. The defects here are those scales. Before dipping a production piece in any glaze that has been in storage it is a good idea to assess it first to see if it needs to be sieved.
Sieves are important in ceramics for removing particulates and agglomerates from glaze, engobe and body slurries.
Crystals or crystalline particles will often form over time in ceramic glaze slurries that contain slightly soluble materials.
Understanding your transparent glaze and learning how to adjust its melt fluidity, thermal expansion, color response, etc is a base on which to build all your other glazes.