Pin Holing In Ceramics

Pinholes are small holes in the fired glaze surface penetrating down to the body below often into a surface pore or opening.

Pin holing in ceramics.

A glaze defect where tiny holes are present in the fired glaze surface. Pinholes refer to the small holes usually found on the pottery surface after glaze firing that most of the time penetrates down through the body. I have summarized the many experiments i did with dozens of potters who have had this problem over the years. Pin holing are tiny holes in the finish caused by surface porosity or other imperfections in the substrate.

Kai ceramics 390 416 views. This is a 34 page pdf outlining my experience with the problem of pinholing in glazes. Kiln opening pottery glazing 4 dipped handglazed ceramic cups. Pits are smaller they mar the surface but to not penetrate all the way down.

Pinholes or pits are often no larger than the head of a pin. These holes normally go down to the body surface below. Pinholing is a common surface defect that occurs with ceramic glazes. Slow firing at peak temperature helps heal pinholes but preventing them in the first place is the holy grail of a smooth glaze.

The problem emerges from the kiln and can occur erratically in production. Ceramics glaze flaws glazes pinholes pottery. Brushing glazes with the clay lady duration. Another common cause of pinholes and blistering is the firing cycle that does not match the particular clay that you are firing.

A pinhole marring a fired glaze is possibly the most troublesome of all glaze faults disrupting an otherwise smooth surface.