Pin Holing In Ceramics

Slow firing at peak temperature helps heal pinholes but preventing them in the first place is the holy grail of a smooth glaze.

Pin holing in ceramics.

The problem emerges from the kiln and can occur erratically in production. Kai ceramics 390 416 views. Pinholes are small holes in the fired glaze surface penetrating down to the body below often into a surface pore or opening. Kiln opening pottery glazing 4 dipped handglazed ceramic cups.

I divided the solution into pinholes caused by. 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. 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. 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. Brushing glazes with the clay lady duration. 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.

A glaze defect where tiny holes are present in the fired glaze surface. Pinholes or pits are often no larger than the head of a pin. Pinholing is a common surface defect that occurs with ceramic glazes. 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.