Enameling

Chapter 1: Why Firing Schedules Make or Break Cloisonné and Champlevé

Every kiln is a liar. It tells you it's at 1450°F when the enamel on your test piece is still crawling like cold honey. It tells you it's holding steady when the pyrometer needle is actually drifting five degrees every thirty seconds. And the worst lie of all: it tells you that firing is just "getting the piece hot enough." If you carry that assumption into cloisonné and champlevé, you will produce cracked glass, mud-colored transparents, and wire that lifts off the base plate on the third firing. I know, because I did all of those things before I stopped treating my kiln like a toaster oven and started treating it like the precision instrument it actually is.

A kiln is not a heat source. A heat source is a campfire. A kiln is a controlled thermal environment with a specific duty: to deliver a precise amount of energy to a specific area of glass and metal over a defined period, then remove that energy in a way that allows the glass to lock into its intended molecular structure. The difference between a campfire and a kiln is not the temperature — it's the schedule. The schedule is the sequence of temperature changes, hold times, and cooling rates that you impose on the piece. It is the difference between a transparent enamel that glows like a jewel and the same enamel that comes out cloudy, cracked, or the