Volcanic Stone Old Red Brick Tea Tray Dry Brewing Tea Table | MoriMa Tea

Our volcanic stone is quarried from deep deposits below the active weathering layer — cleaner material to begin with. Then we fire the stone at high temperature, which burns out any residual organics and creates a micro‑sintered surface that resists odor absorption. The tray does not smell like anything out of the box. If you keep it clean and let it dry between sessions, it will never develop that wet‑basement note. We also include care instructions for the 1% of cases where hard water leaves mineral deposits — a quick vinegar rinse fixes it.

Yes — if the brick is unsealed construction waste cut on a dull saw. Cheap "old brick" trays skip the stabilization step entirely. Raw brick is soft and friable. Every time you move it, microscopic clay particles shear off. We fix this at the workshop. After cutting, the brick top goes through a two‑step stabilization: first a low‑temperature pre‑fire that hardens the surface without closing the pores, then a final flame treatment that burns off loose clay fines. Run your finger across our brick — you will feel texture, not dust. We also test every tray on a black cloth. If any brick transfers pigment, it does not ship. No red dust. No stained linens. No mess.

The term "dry brewing" has been hijacked by sellers who polish their stone trays to a glassy finish. Polished stone does not absorb — it pools. Then you have to wipe it manually, which defeats the purpose. Volcanic stone is naturally porous. The problem is that many manufacturers over‑polish the surface to make it look "premium," sealing the pores shut. We take the opposite approach. Our trays are flame‑finished with the pores deliberately left open. Pour 30ml of water on the surface: it disappears into the stone in under ten seconds, leaving no standing liquid. The concave brewing area is calibrated at 180ml capacity — enough to handle a full session's worth of accidental spill without overflowing. And because the stone breathes, that moisture evaporates naturally rather than getting trapped inside to grow mildew.

Thermal shock happens when the tray material expands at a different rate than the hot liquid hitting it. Engineered stone and reconstituted materials are particularly bad at this — they contain resin binders that expand differently from the aggregate, creating internal stress fractures. Even some natural stones have layered structures that separate under repeated heating. Volcanic stone does something different. It is formed from rapidly cooled lava, which creates a chaotic, interlocking crystal structure with no preferred direction of expansion. Heat does not travel through it in straight lines — it diffuses. We have tested our trays with direct kettle pours (95°C / 203°F) for over 500 cycles. No cracks. No surface crazing. The only warning: do not thermal shock it on purpose (ice water followed by boiling water is stupid for any material). Normal use — pouring hot water over your teapot, wiping with a warm cloth — will not hurt it.

Here is the cleaning routine for this tray: rinse with warm water. Wipe with a soft sponge. That is it. For tea stains that have been sitting for weeks: sprinkle baking soda, add a few drops of water, scrub gently with an old toothbrush, rinse. No soap (it leaves residue that can trap odors). No vinegar (acid can etch natural stone over time). No soaking. No dishwashers. If you want the aged look, let the stains accumulate — some people like the dark patina that develops where the teapot sits. If you want it to stay clean, rinse after each session. The tray does not hold onto tannins the way unglazed clay does, so a quick rinse is genuinely enough.

Humidity is the enemy of bamboo, wood, and unsealed clay — all of which hold moisture internally and take days to dry. Mold loves those materials. Volcanic stone behaves differently. It is inorganic — nothing for mold to eat. And because the pores are open, water that enters the stone also leaves the stone quickly through evaporation. In our humidity chamber tests (85% relative humidity, 72 hours), the stone surface remained free of microbial growth. The red brick top was also clean, because the flame finish creates a surface that water beads off rather than soaking in. The only scenario where you might get surface mold is if you leave standing liquid on the tray for a week. Do not do that. Rinse and air dry after each session. If you forget and find a spot, a wipe with dilute hydrogen peroxide kills it without damaging the stone.