TL;DR: To glaze porcelain vases, clean the bisque-fired surface, apply glaze by dipping, pouring, or brushing, then fire the piece to the clay’s specified temperature. Success depends on even glaze thickness, a dust-free surface, and matching your glaze to porcelain’s high firing range.
Step 1: Start With a Bisque-Fired Porcelain Vase
Your vase must be bisque-fired first, meaning it has been fired once without glaze. Porcelain bisque is dense and smooth, so handle it gently. Wipe the entire vase with a damp sponge to remove dust, oils, and fingerprints. Any residue will cause glaze to crawl or pull away during firing.
If you want to dig deeper, check out our guide on Why the Croc Comfort Trend Is Taking Over Your Office.
Step 2: Choose the Right Glaze
Porcelain typically matures between cone 6 and cone 10, so confirm your glaze is formulated for that range. Mid-range and high-fire glazes bond properly with porcelain’s vitrified body. Test a small tile first if you are unsure how the color will develop.
Step 3: Mix and Prepare the Glaze
Stir settled glaze thoroughly, then check consistency. It should coat your fingers like thin cream. Add water gradually if it is too thick. Strain the glaze through an 80-mesh sieve to remove lumps that would mar your vase’s surface.
Step 4: Apply the Glaze
For even coverage, dip the vase quickly and steadily, holding it by the foot. For narrow necks, pour glaze inside, swirl, and drain. Brushing works well for touch-ups but often leaves streaks. Aim for a layer about the thickness of a business card.
Step 5: Clean the Foot and Fire
Wipe glaze off the bottom foot ring with a damp sponge; glazed feet fuse to kiln shelves. Let the vase dry completely, then fire it to the glaze’s recommended cone. Cool slowly to prevent crazing or shivering.
FAQ
Q: Can I glaze a porcelain vase twice?
A: Yes, but only if the first glaze layer is thin and the second firing matches the glaze’s cone, or the surface may run or bubble.
Q: Why does glaze peel off my porcelain vase?
A: Dust, oils, or too-thick application cause crawling; wipe the bisque clean and apply thinner, even coats.
Q: What temperature do I fire a glazed porcelain vase to?
A: Fire to the cone printed on your glaze label, usually cone 6 or cone 10, which suits porcelain’s maturation range.
Leave a Reply