Which is safer, changing kiln cups or making cups?

Both of them are safe.

Kiln glaze tea set, kiln glaze is fired at high temperature, the color is naturally formed in the process of firing in the kiln, and there is no toxic substance, so it can be used safely.

The raw material of burning lamp is a kind of pollution-free and pollution-free safety material. The main component of Jianzhan combustion material is hematite, a natural plant ash.