5 Kiln Loading Tips That Protect Your Best Glaze Tests

You spent all week painting test tiles. Layering glazes. Taking notes. And now you're about to shove them two inches from the burner ports? Stop. Seriously. The hot zone near your elements or flame path runs hotter than the rest of your kiln. Way hotter. Your best tests will blister, crawl, or run right off the edge. Tuck them in the middle shelves. Centered. Not hugging the wall. They'll actually survive.

Cramming the Kiln Wastes More Than Space

Your home studio kiln is tiny. Firing costs money. I get it. But jamming test tiles shoulder-to-shoulder like a subway at rush hour? That's how you get garbage data. One tile comes out perfect. The next looks like it was fired on Mars. Give each piece a half-inch gap. Minimum. Air has to move. Heat needs to dance. If you can't fit everything comfortably, run two firings. Bad information is worse than no information.

Level Shelves or Say Goodbye to Your Best Work

Here's the thing. A tilted shelf doesn't just look sloppy. It destroys glaze tests. Glaze runs downhill when it's molten. If your shelf dips even slightly, that run lands on the tile below. Or your kiln floor. Your best cone 6 liner test just became a permanent tattoo on the shelf. Check your posts. Use an actual level. Don't eyeball it. Because scraping glaze off a kiln shelf at midnight isn't a hobby. It's punishment.

Don't Let Runny Glazes Crash the Party

Not all glazes play nice. That experimental copper red you're testing? Gorgeous. That thick, runny ash glaze on the mug beside it? A menace. If it drips, it will hunt down your test tiles. Load your glaze tests on their own shelf. Or surround them with stable, well-behaved glazes you actually trust. No runny metallics nearby. No thick tenmokus giving them a hug. Protect your tests like they're the last slice of pizza.

Draw the Map or Lose the Data

You open the kiln. Pure magic. One tile is flawless. And you have zero clue where it sat. Top shelf? Left side? Near the peep? Congrats, you just wasted a firing. Grab a notebook. Sketch your firing arrangement before you close the lid. Note which glazes sat where. Which tiles touched the thermocouple. This isn't busywork. It's the difference between guessing and knowing why a glaze worked. Next time you want to replicate that satin white? You'll know exactly where to put it.