Had read somewhere that a cone 10 glaze can be fired at cone 5 with the addition of Silicon Carbide (around 7%) in order to create a lava-type glaze. I’ll start with Chun Blue; also a Reitz Green one. Thoughts? Have had success with Marilee’s Lava recipe in the past with added Copper at cone 5. Thanks!
I think that there is some confusion/disagreement on the amount of SiC in Marilee’s Lava, possibly due to a historic typo.
Glazy gives +0.34 https://glazy.org/recipes/24043
While this paper gives +3.5 https://www.thestudiomanager.com/posts/tag/lava+glaze Many recipes list the silicon carbide in this glaze as 0.34, but I’ve seen enough others arguing that was originally a typo many years ago, so I went with the 3.5% recipe.