How much Albany slip do potters use in a glaze?

Across 163 published glaze recipes containing it, the typical amount is 60% of the dry batch, with half of recipes between 35.8% and 75%. Colorants and additives sit far lower than fluxes and glass formers; treat these as a range to test around, not a target.

What cone is Albany slip used at?

It appears in recipes across the range; the most common cones among published recipes are cone 10, cone 6, cone 9. Where a material sits depends on the rest of the recipe more than on the material itself.

Is Albany slip safe to use?

It carries no specific hazard flag beyond the general rule for all dry ceramic materials: avoid breathing the dust and read the supplier's SDS.

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Glaze material · Clays

Albany slip

A natural slip-glaze clay that melts to a glaze on its own at high fire; no longer mined.

colorantfluxstiffens the melt (alumina)glass formerContributes: Fe₂O₃ · CaO · MgO · K₂O · Na₂O · Al₂O₃ · SiO₂

In published recipes

Used in 163 of 10,859 glaze recipes (1.5%)

Typical amount when present

60% of the dry batch — half of recipes fall between 35.8% and 75%.

Fired surface of those recipes

Glossy 43% · Matte 26% · Semi-glossy 17% · Satin matte 15%

Cones where it appears

Share of recipes containing this material that fire to each cone.

Most often mixed with

Materials that appear in the same recipes most often.

Whiting36%Nepheline syenite29%Red iron oxide24%EPK19%Cobalt carbonate19%Barium carbonate15%Custer feldspar15%Silica13%

Chemistry

Raw formula: 0.059Na₂O·0.156K₂O·0.309MgO·0.476CaO·0.659Al₂O₃·4.42SiO₂·0.023TiO₂·0.15Fe₂O₃·2.399H₂O
Molecular weight: 459.3
Fired formula: same, without the 2.399 H₂O

From Linda Arbuckle's materials table. Mineral formulas are idealized; buy an analysis for the bag you have. Equivalent weight is the weight that supplies one molecule of the fired oxide — the number glaze calculation uses.

What potters should know

Its formula carries iron, calcium, magnesium and alkalis alongside clay — colorant, flux and glass all in one bag. Substitutes potters reach for: Blackbird or Barnard (slightly more fluxed) and Alberta slip, or a blend of Redart, dolomite and soda ash.

Handling and safety

Crystalline silica: the primary respiratory hazard in a ceramic studio (silicosis with chronic exposure). Wet processes, ventilation and a fitted respirator when dry.

Dry ceramic materials generate respirable silica dust. Use a NIOSH-approved N95 or P100 respirator and adequate ventilation when mixing dry, and wet-clean surfaces.

This information is provided for planning purposes and is derived from publicly available sources including OSHA regulations, NIOSH guidance, and manufacturer safety data sheets. It does not constitute professional safety advice. Consult your material suppliers' SDS documents and applicable local regulations for authoritative safety guidance.

Questions

How much Albany slip do potters use in a glaze?: Across 163 published glaze recipes containing it, the typical amount is 60% of the dry batch, with half of recipes between 35.8% and 75%. Colorants and additives sit far lower than fluxes and glass formers; treat these as a range to test around, not a target.
What cone is Albany slip used at?: It appears in recipes across the range; the most common cones among published recipes are cone 10, cone 6, cone 9. Where a material sits depends on the rest of the recipe more than on the material itself.
Is Albany slip safe to use?: It carries no specific hazard flag beyond the general rule for all dry ceramic materials: avoid breathing the dust and read the supplier's SDS.

Related materials

Glaze material	recipes	typical
Alberta slip	60	51%
Barnard slip	75	20%
Redart	195	27%

Sources. Usage figures are computed by Claybench over 10,859 glaze recipes compiled from publicly shared community recipe collections (snapshot 2026-02-27) — counts only; no recipe is reproduced, and the figures describe that collection, not every recipe in existence. Material roles and notes are paraphrased from Linda Arbuckle's Ceramic Materials handout unless noted. Hazard notes summarise supplier SDS guidance; read the SDS for the product you buy.

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