Why silica dust deserves your respect

Clay feels benign. It is soft, cool and forgiving in the hand, and most of us started potting precisely because it seemed like a gentle craft. The dust it produces, however, is anything but gentle. Clay bodies and glaze materials contain crystalline silica, and when those materials dry out and become airborne, the finest particles — the ones you cannot see in a shaft of light — can travel deep into your lungs and stay there.

This is not a scare story about a single messy afternoon. It is about the slow accumulation that happens over twenty or thirty years of studio work. The risk is real, but it is also largely manageable with a handful of sensible habits. Think of dust control the way you think of wedging: tedious at first, second nature within a month, and absolutely worth the effort.

Know where the dust comes from

Dust is not only made when you sweep. It is generated every time a dry material is disturbed, and the invisible fraction is the dangerous one. The usual culprits include:

• Mixing dry glaze ingredients such as flint, quartz and feldspar.
• Wedging, slamming or dropping bone-dry clay and greenware.
• Sanding or fettling bisque ware, which throws off a very fine powder.
• Trimming and carving leather-hard pots onto a dry surface.
• Moving stored bags, boxes or buckets that have settled dust on top.

Note how many of these are ordinary, everyday tasks. The point is not to fear them but to change how you carry them out — above all, by keeping everything damp.

Wet cleanup: the single most important habit

Dry sweeping is the fastest way to put a studio's worth of settled silica back into the air you breathe. Ban the broom from your workspace. In its place, build a wet-cleaning routine that takes five minutes at the end of each session.

• Mist surfaces lightly with a spray bottle before wiping, so dust is captured rather than lifted.
• Use damp cloths, sponges and paper towels, and rinse them in a bucket of water rather than under a running tap where spatter spreads.
• Mop floors with plenty of water, changing it often. A two-bucket system keeps the rinse water cleaner for longer.
• If you use a vacuum, choose one with a suitable fine-particle filter and clean or replace it as instructed. An ordinary household vacuum will simply blow the finest dust straight back out.
• Never use compressed air to clean shelves, tools or your wheel. It is the most efficient dust-distribution device ever invented.

Leave the bucket and mop where you can see them. Convenience beats good intentions every time.

Masks, mixing and the dry side of the studio

Damp methods control dust you have already made. Respiratory protection controls what you make in the first place, and nowhere matters more than the glaze mixing bench. When you handle dry materials, wear a properly fitted mask rated for fine particulates — an FFP3 disposable or a reusable half-mask with a P3 filter. A nuisance-dust mask, a surgical mask or a piece of cloth will not do the job. The seal depends on a clean-shaven contact area, so stubble around the jawline will compromise it.

Technique matters as much as kit. Pour powder slowly into water rather than adding water to powder, lower scoops gently beneath the surface, and weigh out materials inside a shallow tray or plastic-lined box so spills stay contained. Keep lids on buckets, store dry materials in sealed containers, and keep the mixing area physically separate from where you throw, trim and finish work. If you can, mix under local extraction or beside an open window with a fan pulling air away from you, not across the room.

Set up the studio so it works with you

Design decisions made once will protect you for years. Smooth, washable floors — sealed concrete, vinyl or quarry tiles — beat bare boards and cracks every time. Keep open shelving to a minimum, since horizontal surfaces collect dust; closed cupboards are your friend. Choose a cotton or denim apron rather than a dusty fleece, and wash it separately from the family laundry rather than shaking it out in the studio.

Keep an air cleaner running if the space is enclosed, but treat it as a supplement rather than a substitute for wet cleaning and extraction. Finally, keep food and drink out of the workspace, and wash your hands before you leave. Silica dust on your hands ends up on your sandwich.

Small routines, long career

Nobody wants to spend their potting time thinking about particle sizes. The trick is to make good practice automatic, so it costs you almost no attention. Try a short end-of-session ritual: spray, wipe the wheel and bench, mop the floor, rinse your sponge, empty the bucket, and hang your mask in a sealed box rather than on a peg where it gathers dust. Sand only at a designated wet station, and keep the dry materials cupboard closed.

Then invite the same standards into your teaching, your shared studio or your evening class. Dust does not respect the idea that "it's only a hobby". A little discipline now means you can keep your hands in clay for decades to come — which, after all, is the whole point.