Pin Holing In Ceramics

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

Pin holing in ceramics. This is a 34 page pdf outlining my experience with the problem of pinholing in glazes. Another common cause of pinholes and blistering is the firing cycle that does not match the particular clay that you are firing. Kiln opening pottery glazing 4 dipped handglazed ceramic cups. Brushing glazes with the clay lady duration.

A glaze defect where tiny holes are present in the fired glaze surface. These holes normally go down to the body surface below. 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.

I divided the solution into pinholes caused by. Pinholes are small holes in the fired glaze surface penetrating down to the body below often into a surface pore or opening. Ceramics glaze flaws glazes pinholes pottery. Pin holing are tiny holes in the finish caused by surface porosity or other imperfections in the substrate.

Pinholes or pits are often no larger than the head of a pin. Pits are smaller they mar the surface but to not penetrate all the way down. 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. 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.