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Every ceramicist has had a glaze fire totally differently than expected — and thickness is often why. In this video I show exactly how application thickness changes glaze results, using silicon-aluminum mapping tests and the Stull chart to explain what’s happening chemically.
From glossy to matte, crawling, and full lava effects — all from the same glaze, just applied differently.
Timestamps:
0:00 – Introduction & channel overview
1:42 – What is silicon-aluminum mapping?
2:09 – Reading the Stull chart (gloss, matte, under-fired)
2:47 – How flux ratio affects melt
3:15 – Example 1: Crawling from thick application & over-Illumina
4:15 – Example 2: Thick low-water glazes & dramatic mat crawl
5:27 – Example 3: Lava glaze & puffy crawl effect
5:49 – Takeaways & closing thoughts
Want to go deeper?
🎨 Textures in Ceramics course (glaze chemistry, wild materials & special effects) → https://www.loramceramics.com/textures-in-ceramics/
🌋 The Glaze is Lava course (everything about lava glazes) → https://www.loramceramics.com/the-glaze-is-lava
💛 Patreon — get all the recipes, firing programs & glaze guides ($15/month) → https://www.patreon.com/c/MariaLoram
I’m Maria Loram — a functional ceramics artist creating pieces for interior design. On this channel I share glaze experiments, studio life, the real side of running a creative business, and everything in between.
🔔 Subscribe for new videos every week 🌐 https://loramceramics.com 📸 https://www.instagram.com/loram.ceramics/
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ceramics #glazes #pottery #glazereview #stullchart #lavaglaze #ceramicstips
I’m Maria Loram — a functional ceramics artist creating pieces for interior design. On this channel I share the real side of running a creative business: clay, glazes, money, travel, and everything in between.
🌐 Website: https://loramceramics.com/
📸 Instagram: https://www.instagram.com/loram.ceramics/
If you enjoyed this update, please subscribe, like, and share — more videos are coming (I’ve already filmed six or seven!). See you in the next one. 🌿
Loram Ceramics Youtube Channel
