Glazes There are several ways to add color to your work: A. Under glaze B. Stains C. Glaze D. Over glaze (Clear bright gloss or matte) 1
Underglazes Use an UNDERGLAZE, which has NO GLOSS OR SHINE, to place color on an unfired bone dry piece. In our class the jar is marked with a RED dot. Underglazes are best for intricate designs. Use them almost as a paint; they do not run as a glaze will. Do not use an underglaze if you want your project all one color, it is best to wait until it the project has been bisque fired. 2
Underglazes (continued) Place on the top shelf of the bone dry green ware shelves. After firing, a clear gloss or matte glaze must be applied over the underglaze to seal the clay. However too much clear coat will RUN! Please use only one THIN coat of clear glaze. 3
Stains Stains are a liquid oxide that impart color only. These stains may be rubbed or painted onto the surface of a greenware or bisque fired piece. Stains can also be used to write your name on your project if it is too dry to carve it in. 4
Stains (continued) A gloss or matte glaze must be applied to the surface of the stain when using the stain alone to achieve a sealed surface, unless you used it to write your name. In our classroom, these stains are marked with a BRIGHT PINK dot. 5
Clear Glaze Problems Pink Underglazes When using pink and plum underglazes, use only the “clear matte” glaze over those colors. Other Problems DON’T USE CLEAR MATTE ON STAINS The stains turn an undesirable color of Green 6
Glazes Glazes are gloss, matte, or satin finish. These substances contain color and a glass medium. These glazes will come straight out of the jar in this classroom. Nothing needs to be added to the substance. DO NOT ADD WATER. Check the color chip (cookie) on the classroom displays to find what the desired color will look like once it has been fired. 7
Glazes (continued) Paint the color with a brush, or sponge, on to a bisque fired piece. The work is then fired again, usually to a higher temperature. In our classroom, there will be NO DOT on the lid of these glazes. 8
Texture Glazes Using texture glazes will give you the look of a mixture of colors while only using one glaze. In our class most of these glazes will have a yellow label & say texture on the label. In our class Hyacinth, Chun Red, and Cappuccino will also show a textured effect even though the label does not say texture. 9
Using Glazes Always pick jar up from the bottom, not the lid. Use only glaze sponges or paintbrushes to apply the glaze. Rinse with water before using to make sure no glaze is left over from prior use. Stir all glazes well before using with paintbrush, spoons, or whisks. If glaze is too thick please let instructor know. Do not add water! 10
Using Glazes (cont.) Before glazing a bisque piece, run the object under running water for a moment. Let the object drip dry. Do not dry with a towel. Place the object on clean newspaper. Be sure to wash your brushes before and after use. Use a separate brush for each color that you are using. Take only one jar of glaze to your table at a time. 11
Using Glazes (cont.) Apply 2 to 3 thin coats of glaze to piece and let dry in between coats. Do not apply any glaze onto bottom of the piece. (dry foot) Textured glazes, High Gloss Black, Gloss Black, Clear Bright, Peacock, Robin’s Egg and Cappuccino are all very drippy, so only 1 to 2 very thin coats need to be applied. 12
Using Glazes (cont.) After using glazes always rinse and clean sponges and brushes & replace on the shelves where you found them. If you don’t know where it goes, please ask. Wipe off the lip of the jar with a damp paper towel or cleaning sponge if necessary and put lid tightly on jar. If lid is not put on properly, the glaze will dry out. 13
Using Glazes (cont.) Wipe up any spills and replace jar up side down on shelf. Place glazed projects on the glazeware shelves to be fired after wiping bottom of project with a damp cleaning sponge to remove any drips or spills. 14