Painting and Glazing

1. Painting and Glazing • Similarities: • Look similar. • Both brushed on bisqueware. • Bisqueware should be washed before using paint or glaze. • Set up and clean up are the same for paint and glaze.

2. Painting and Glazing • Differences: • Glaze must be fired, paint does not. • Glaze frequently looks different after it is fired. Paint color is the same on the work as it is in the bottle. • Glaze requires 3 coats, paint requires 1. • Paint costs $1 per bottle, glaze costs $14 per bottle.

3. Painting • Gently wash bisqueware. • Set up table with newspaper, paint, brushes, and water. • Mix paint colors on “shiny” paper. • Dip paint brush in water and paint frequently because ceramics absorb paint and water quickly. • Be sure to paint the entire work except the bottom.

4. Basic Glaze Chemistry Glaze is a mixture of pulverized glass, various minerals to produce color, and water

5. Types of Glaze: • Under glaze (U) – under glaze is designed to look basically the same before and after it is fired. • Under glazes can be mixed like paint to make new colors. • Under glaze is matte. • You can cover it with cleargloss glaze to make it look shiny.

6. Types of Glaze cont: • Gloss (G) – gloss glaze is very shiny. • Gloss glaze frequently looks different after it is fired due to the chemical change of its components. • Satin – Satin glaze is labeled as gloss (G) because it performs just as gloss glaze does except that it will not be as shiny.

7. Types of Glaze cont: • Semi-transparent (ST) – the term semi-transparent can apply to any glaze. • It means that you will be able to see through the glaze. • The color of the clay will affect the color of the glaze with ST glazes. • ST glazes are on the shelves with gloss glazes because they function the same.

8. Types of Glaze cont: Special Effects Glazes • Texture (T) – Texture glazes are designed to become crackled, rough, or bumpy when fired. • Crystal (C) – Crystal glazes contain tiny particles which burst with color when fired. Crystal glazes make speckled, spotted, or mottled colors when fired.

9. Remember! • Always read the jar carefully before you begin glazing. The lid may or may not be accurate!!!!

10. Glazing Techniques: • Brushing: Using a paintbrush to apply 3 flowing coats of glaze to a ceramic piece. • Brushing is the technique we use 99% of the time in our class. • Dry footing: Leaving the bottom of a ceramic piece unglazed

11. Glazing Techniques cont: • Dipping: Dipping is actually dunking an entire ceramic piece into a large bucket or vat of glaze. • Pouring: Pouring is used to glaze the inside of pottery by pouring glaze into the pottery, rolling it around to coat the inner surface, then pouring the excess out.

12. Less frequently used techs • Slip trailing: This type of glazing is using a squeeze bottle to draw with the glaze on a ceramic piece. • Wax resist: Painting on liquid wax or drawing it on using a wax stick, then glazing a ceramic piece. The glaze can be easily wiped from the wax leaving an unglazed pattern on the work.

13. Glazing quick reference 1. Setup: newspaper, water, paintbrush 2. Wash ceramic piece before glazing. 3. Select glaze. Stir, add water if needed. 4. Brush on 3 coats. Glaze inside 1st. 5. Dryfoot bottom. Clean with sponge if needed. Leave inner rim of lids unglazed. 6. Place finished items on glaze cart.

14. Glazing requirements • Use 3 coats. • Be neat, especially where 2 colors meet. • Don’t miss any spots. • Make sure the bottom is clean. • Leave the inner rim unglazed. • Put name on bottom with PENCIL and place box and lid side by side on glaze cart.

15. On the next page in your journal begin a glaze log. • Write Glaze Log at top of page. • Draw 2 lines down the page to make 3 columns. • Label column 1: Project • Label column 2: Glaze name • Label column 3: Glaze outcome • Each time you glaze a pot make a record of it.