GLOST

--:--Longton

5 : 110 : 1Matte sideMore than one part alumina to five of silica. Glazes here set satin or dry.Gloss bandBetween 5 : 1 and 10 : 1. Most clear and coloured gloss glazes live here.Glossy and fluidBelow 10 : 1. Glazes run, separate, grow crystals or craze.Stiff at cone 10Too much silica and alumina to melt smooth.
LibraryGLOST
DrawingStull chart, after R. T. Stull (1912)
AxesSilica and alumina, unity moles
Left outColourants
Tiles24, cones 6 and 10
Sheet1 of 1 · Longton
Test tile 001, Longton Celadon: gloss, fine crackle001C10RLongton Celadon Test tile 002, Qingbai Blue: gloss002C10RQingbai Blue Test tile 003, Olive Celadon: gloss003C10ROlive Celadon Test tile 004, Tenmoku: gloss, rust breaks004C10RTenmoku Test tile 005, Hare's Fur: gloss, fur streaks005C10RHare's Fur Test tile 006, Oil Spot: gloss, silver spots006C10OOil Spot Test tile 007, Kaki: satin, iron crystals007C10RKaki Test tile 008, Chun Blue: opal gloss008C10RChun Blue Test tile 009, Copper Red: gloss, clear rims009C10RCopper Red Test tile 010, Carbon-Trap Shino: satin, carbon trap010C10RCarbon-Trap Shino Test tile 011, Wood Ash 40 · 40 · 20: gloss, runs011C10RWood Ash 40 · 40 · 20 Test tile 012, Nuka White: opal satin012C10RNuka White Test tile 013, Dolomite Matte: matte, buttery013C10RDolomite Matte Test tile 014, Slate Matte: matte014C10RSlate Matte Test tile 015, Lichen Crawl: dry, crawled015C6OLichen Crawl Test tile 016, Zinc Crystalline: gloss, crystals016C10OZinc Crystalline Test tile 017, Floating Blue: gloss, variegated017C6OFloating Blue Test tile 018, Twenty × Five Clear: gloss018C6OTwenty × Five Clear Test tile 019, Cobalt Gloss: gloss019C6OCobalt Gloss Test tile 020, Chrome-Tin Pink: gloss020C6OChrome-Tin Pink Test tile 021, Oribe Green: gloss021C6OOribe Green Test tile 022, Rutile Ochre: satin, streaked022C6ORutile Ochre Test tile 023, Strontium Turquoise: satin023C6OStrontium Turquoise Test tile 024, Ge Crackle: satin, inked crackle024C10RGe Crackle

GLOST, a glaze library in Longton, Stoke-on-Trent

24 tested glazes on a Stull chart. Each tile sits where its recipe lands: silica across, alumina up.

50%SiO2 3.75 · Al2O3 0.50
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Drag or scroll to move. Click a tile to open it.

All 24 as a list

Kilns

What we do

Every tile on the board was mixed and fired here.

Read any recipe for free, send us yours to fire, or learn to read the chart yourself.

Close-up of tile 001, Longton Celadon: fine crackle in a jade glaze, pooling darker in the thrown grooves
Tile 001, Longton Celadon, at three times life size.
Free

Look a glaze up

24 recipes with their unity formula, the kiln they were fired in and what came out.

Open the library
£6 a tile

Send us a recipe

We mix 100 g, dip two tiles and fire them on Tuesday or Friday. Posted back within ten working days.

How testing works
£60 · 3 evenings

Learn the chart

Reading the Stull chart, three Thursdays from 6 to 8 pm. Eight places on each course.

Classes and dates