How do you use overglaze?
Saturate the bristles with overglaze and work out the excess. Use firm, even strokes one next to the other. Apply as evenly as possible. Allow to dry before firing.
What are 4 different methods of applying a glaze?
Typically, there are nine ways to apply glazes. These include dipping, dripping or pouring, brushing, spraying, splattering, stippling, sponging, glaze trailing, and glazing with wax resist.
What does overglaze compatible mean?
In the case of overglaze, you burn the glazing on the porcelain and then paint it. While when using underglaze the paint is applied on the unglazed porcelain and then the glaze is applied over the paint.
What is oxidation firing?
Details. A firing where the atmosphere inside the kiln has sufficient supplies of oxygen to react with the glaze and clay body surfaces (and thus produce the colors characteristic of this). Electric kilns are synonymous with oxidation firing.
What are the 8 ways to apply glaze?
The application of the glaze follows these decisions. They will, to some extent, have predetermined the application methods that will be used to achieve the desired result, including brushing, dipping, pouring, spraying, stippling, spattering, sponging, trailing, and multiple glaze applications.
What are the three key components in a glaze formula?
Glazes need a balance of the 3 main ingredients: Silica, Alumina and Flux.
- Too much flux causes a glaze to run, and tends to create variable texture on the surface.
- Too much silica will create a stiff, white and densely opaque glass with an uneven surface.
What is the difference between underglaze and overglaze decals?
Underglaze decoration uses pigments derived from oxides which fuse with the glaze when the piece is fired in a kiln. It is also a cheaper method, as only a single firing is needed, whereas overglaze decoration requires a second firing at a lower temperature. Other colours turned black in a high-temperature firing.
How do you fire ceramic decals?
Hold down one edge and gently slide the paper from under the decal, leaving the image on the covercoat only. Warming the ceramic/glass is also helpful. Heat lamps or a hot plate with kiln-furniture to support the ceramic or glass allows for gentle heat- warm to touch. This helps keep the decal flexible.
Can you use overglaze on top of glaze?
China paints, also known as overglaze enamels are painted onto glazed pottery. You can put china paint on glossy or matte glaze. China painting is quite labor-intensive in that you have to fire the piece between layers. It is fired at a low temperature to make sure that the glaze underneath does not start to melt.
What happens when you put majolica underglaze on glaze?
As such, when the pottery is fired, the majolica underglaze melts into the white glazes that it is sitting on. This is called inglazing. Underglaze that has a high clay content can interact badly with glaze as the glaze melts.
What does the term underglaze mean in decorating?
In spite of this, potters will use the term underglaze to refer to different substances. For example, sometimes underglaze refers to a mix of clay, flux, and stain. At other times, underglaze is also used to refer to a coloring oxide mixed with a decorating medium like CMC gum.
What do you call painting on top of glaze?
There is a long tradition of painting decoration on top of glaze called ‘majolica’. This technique has been around since the 15 th century and has been practiced in different ways over the years. However, when potters now refer to majolica they usually mean a technique applied to a low fire earthenware clay.