Glaze Application tips for Bisqueware

Application is a very important factor in determining the fired surface quality.
 Thickness and method of the application can drastically affect results. Experiment with sponging, brushing, pouring, dripping, scratching into surface, layering- to list just a few possibilities.
Before you start some basic rules for all types of glazing techniques:
NEVER add water to a glaze, slip , oxide or any materials in the studio. If it looks too thick or thin tell the professor or Nathan asap.

Always sponge off your bisqueware to remove dust and oils that may have collected and will prevent  glaze from working correctly. Let bisque dry thoroughly before glazing.

Have your sketchbook ready to record what you do. You will NOT remember and I will ask you "How did you do that?

Wipe off the bottom of all work as glaze melts and will stick your work to the shelves. Leave 1/4 inch from the bottom for room for glazes that might run as you are learning.

WAYS TO GLAZE:
Painting: Even applications are best. • Use soft brushes- sumi Japanese brushes work best as they load up liquid and flow smooth and evenly)
• Apply in short, loaded strokes • It is usually necessary to apply 2- coats to be sure all parts are evenly coated. I suggest painting in one direction. Letting that dry and then painting in the opposite direction to cover more surface.
 • Let dry completely between each coat to prevent pulling off layers*
Advantages: • Requires only a small amount • May be best method for small scale work • Easy, low tech
 Disadvantages:• Even though 2 coats are applied, painted glazes often appear splotchy after firing due to uneven coating • When the 2nd coats are applied, the brush tends • to pick up patches of glaze, causing thin spots*
 
Dipping:

I'll be passing out a I'll be passing out a handout and giving a demo but this post is important to read and reread for help. Always stir bucket well. Glaze tends to settle. 

Make sure to let glaze dry before you dip again especially if it is another glaze.

Look at the test tiles on the wall to see what type of glaze you are using. Matte glazes tend to stay put while glossy glazes tend to run. Never dip more than twice and be aware if it is a Matte or glossy glass so you can predict how high your second dip should be... grinding glaze off of kiln shelves is never fun a and it will be your job if it is your fault.

Always wipe off the bottom and 1/4" up the side of your piece when finished. Again because glaze will fuse to kiln shelves.

Spraying: Advantage is it's great for a even coats and covering larger forms. Disadvantages are set-up, clean-up and it takes many more coats... 5 or so... ask Janet as she is the spray booth expert!

Another disadvantage is that it can be hard to do sections or smaller areas. You can tape off or wax... I'll talk about this next Tuesday.