Learn · Glaze safety

Storing Glaze Chemicals Safely in a Home Studio

By Christina Phillips, safety professional and potter · October 2026

Open a home potter's glaze cabinet and you'll often find the same scene: torn bags, mystery powders in unmarked jars, oxides shelved above the snacks. Those bags hold industrial chemicals — metal compounds, crystalline silica, colorants — and they deserve the same respect in a spare bedroom that they'd get in a factory. Storage is unglamorous. It's also where most home-studio chemical mistakes begin.

Keep everything in original, labeled containers

The manufacturer label is your lifeline: it names the material, the hazards, and the handling precautions. Never transfer powders into food jars, drink bottles, or unmarked bins — a white powder in a jam jar is a poisoning waiting for a rushed morning. If you mix your own glazes, label every bucket and bag with the recipe name, the date, and the key hazards. If you can't identify it, treat it as hazardous and dispose of it properly.

Locked away from kids, pets, and food

Glaze chemicals live in the studio — never in the kitchen, never above food-prep areas, never where a curious child or pet can reach. A locking cabinet is ideal; a high, latched shelf is the minimum. And keep the studio itself separated from living areas with a closed door: chemical storage and dust control work together.

Cool, dry, and away from heat

Moisture is the enemy of dry materials — it causes clumping, ruins weighed batches, and can trigger reactions in some compounds. Store bags and buckets sealed, off damp floors (a pallet or shelf beats bare concrete), in a space that stays reasonably cool and dry — a basement that floods in spring is not a chemical store. Keep flammable materials — waxes, oils, some solvents and mediums — well away from the kiln and any other heat source.

Separate incompatible materials

Don't store everything in one jumble. As a baseline: keep acids separated from bases, and keep oxidizers away from flammables. Give each hazard class its own shelf or bin so a knocked-over container can't mix with the wrong neighbor. Your safety data sheets spell out the incompatibilities for each specific material — which is exactly why the next rule matters.

Keep safety data sheets within reach

Every raw material you buy has a safety data sheet (SDS) from the supplier — storage requirements, required PPE, spill procedures, first aid. Keep them where you can grab them in a hurry: a binder on the studio shelf or a digital folder on your phone. When something spills in the evening, you don't want to be hunting through a manufacturer's website.

Spill cleanup basics

Contain first, clean second. For dry spills: don't dry-sweep — that just re-suspends the powder. Dampen it or use a HEPA-filtered vacuum, wearing a respirator and gloves. For liquids: contain with absorbent, ventilate the area, and keep the waste out of drains and household trash — bag it and check your local hazardous-waste rules. Big spill, unknown material, or anyone feeling symptoms? Stop, ventilate, and get help.

Know what you have — and let go of what you don't

Keep a simple inventory: what, how much, where, bought when. Buy in quantities you'll actually use — a one-pound bag you finish this year is safer than a fifty-pound bag you'll store for a decade. Once a year, audit the shelf. Dried-out, unlabeled, or mystery materials go to household hazardous-waste collection — not the trash, not the drain, not the backyard. A smaller, known inventory is safer than a large, mysterious one.