How to Use Luster on Ceramics (and Fire It)

Luster is a thin metallic or pearly finish that gives ceramics a gold, silver, copper, or mother-of-pearl shimmer. It's applied on top of an already glazed and fired piece and then fired again at a low temperature. Here's how to do it.

Before you start

Luster goes on top of a finished glaze. Your piece should already be glazed and fired to its final temperature. Luster doesn't bond well to bare bisque or to a glaze that hasn't been fired. See how to glaze bisqueware and how to fire glazed ceramics first.

What you need

• A glazed and fired piece, clean and dry
• Luster in your chosen color
• Luster thinner for thinning and cleaning
• A small dedicated brush used only for luster (see our brush guide)
• Good ventilation and, ideally, a respirator rated for vapors

Step 1: Clean the surface

Wipe the glazed surface with rubbing alcohol or a clean damp cloth to remove dust and oils. Handle the piece with clean hands or gloves from now on.

Step 2: Apply thinly

Brush on a very thin, even layer. Thick luster can turn dark, patchy, or flaky after firing. If it looks thick or sticky, thin it slightly with luster thinner. One thin coat is usually enough.

Step 3: Let it dry

Allow the luster to dry completely according to the label. Don't touch the surface. Fingerprints will show after firing.

Step 4: Fire it

Luster is fired at a very low temperature, around cone 018 to 019, in a well-ventilated kiln. Use the schedule on the label. Make sure the luster is fully dry before loading, and keep pieces from touching each other.

Safety and use

• Luster releases fumes while drying and firing, so work in a ventilated area and use kiln venting. See our kiln vents.
• Use luster on decorative areas only. Don't use it where food or lips will touch the surface, like the inside of a cup or on a rim, unless the label says it's safe.
• Use a separate brush for luster and keep it away from your glaze brushes.

For help choosing between luster and other finishes, see glaze vs. luster vs. acrylic.