Pin Holing In Ceramics

Pits are smaller they mar the surface but to not penetrate all the way down.

Pin holing in ceramics.

Kai ceramics 390 416 views. A pinhole marring a fired glaze is possibly the most troublesome of all glaze faults disrupting an otherwise smooth surface. Some of things in clay such as organic materials sulfuric compounds manganese and anything else that needs to out gas during the bisque process must be completely burned out during the bisque process. Slow firing at peak temperature helps heal pinholes but preventing them in the first place is the holy grail of a smooth glaze.

Kiln opening pottery glazing 4 dipped handglazed ceramic cups. These holes normally go down to the body surface below. This is a 34 page pdf outlining my experience with the problem of pinholing in glazes. I divided the solution into pinholes caused by.

Brushing glazes with the clay lady duration. Pinholes or pits are often no larger than the head of a pin. Ceramics glaze flaws glazes pinholes pottery. Pin holing are tiny holes in the finish caused by surface porosity or other imperfections in the substrate.

The problem emerges from the kiln and can occur erratically in production. A glaze defect where tiny holes are present in the fired glaze surface. Pinholing is a common surface defect that occurs with ceramic glazes. It is an occurrence of small holes which provide a path of exposure to the substrate from improper spray atomization or segregation of the resin from the pigment in the coating.

I have summarized the many experiments i did with dozens of potters who have had this problem over the years.