What Is Colored Slip In Ceramics

In technical terms standard s white earthenware ceramic casting slip commonly called ceramic slip by most customers is a suspension of clay water and deflocculating suspension agents that nearly matches standard s 105 white earthenware clay in color and has approximately 6 total shrinkage and 17 absorption when properly fired to cone 04 maturity thus allowing moist clay and slip cast projects to be intermixed or combined together.

What is colored slip in ceramics.

It is applied to wet or soft leather hard greenware. When clay is dry the water will dislodge the particles of clay from one another. Bone dry clay will slake down into slip faster than slightly wet clay exspecailly if you take a rolling pin to the dry clay to break it up into small bits. Slip is often used in decoration.

Once the slip layer is dry students can scratch into the surface to draw in a design. Like traditional painting slip painting is usually done with a brush because the slip can also be trailed or dabbed on with a sponge or the fingers. It s a a lot of fun to do washes of color on textured surfaces leaving concentrations of the glaze or ceramic colorants in the recesses. Utilizing tracing paper or stencils can help students achieve even more detailed results with this process.

The effect looks like the clay is dissolving. Slip is usually the consistency of heavy cream. The colored slip is essentially a decorative coating much like an engobe applied to a thrown or handbuilt form but in this case the coating is laid down first. Selectively applying layers of colored slips can create the effect of a painted ceramic such as in the black figure or red figure pottery styles of ancient greek pottery.

It may be left the natural color of the clay body from which it is made or it may be colored with oxides. Slip decoration is an ancient technique in chinese pottery also used to cover whole vessels over 4 000 years ago. Of casting slip is roughly equivalent to one gallon. A quick video showing how i make firstly the slip for the under glazed colour for my pottery.

But sometimes when the clay slip or glaze is washed off the color loses its vibrancy. Lana wilson uses texture and clay slip to decorate much of her work. To make the colored slip ball mill 100 grams of stain per gallon of white casting slip and let them mix for two hours 14 lbs. One method of decorating pottery is to do slip paintings.