In the world of tea ceremony utensils, metalware has long been used alongside ceramics and bamboo. Even within the category of "metal," copper, brass, silver, and stainless steel (corrosion-resistant steel) differ in material composition, the progression of patina (tarnishing), and the required methods of care.
This article draws on public technical data regarding non-ferrous metals from organizations such as the Japan Copper and Brass Association (JCBA) to compare and organize the basic physical properties, differences in oxidation films, and daily care methods for common metal materials used in tea utensils.
1. Comparison Table by Metal Material
| Metal Material | Typical Composition | Aging (Formation of Oxidation Film, etc.) | Daily Care |
|---|---|---|---|
| Copper | Standard copper material | Reacts with atmospheric oxygen to form a brownish to dark brown protective oxide film (antique finish) | Wipe off water droplets and buff with a soft, dry cloth (do not use a dishwasher) |
| Brass | Alloy of copper and zinc | Changes from light yellow to a dull yellowish-brown due to humidity and touch | Dry buffing is standard. Use a metal polishing cloth to remove dullness |
| Silver | Silver / Silver alloy | Reacts with trace sulfur in the air to form a black silver sulfide film on the surface | Regular wiping with a dedicated cloth and airtight storage |
| Stainless Steel | Alloy of iron, chromium, nickel, etc. | Minimal tarnishing due to a passive film; maintains metallic luster for a long time | Can be washed with water and mild detergent. Wipe off water droplets |
2. Characteristics of Each Metal Material
Copper: Antique Finish and Hand-Finished Texture
General copper material has high thermal conductivity among metals and easily forms a protective oxide film on its surface when exposed to the atmosphere. In traditional crafts, it is common to apply a surface color beforehand to establish a calm, antique patina, allowing the user to enjoy the subtle changes in texture through daily buffing. While it is less prone to cracking than ceramics, it may dent, deform, or scratch under strong impact.
Brass: Hardness and Golden Hue
Brass is an alloy of copper and zinc, which gives it higher hardness than pure copper and a distinctive golden appearance. Because it naturally dulls over time, regular maintenance is required to maintain its luster.
Silver: Elegance and Sulfuration
Silver tea utensils are characterized by the unique luster of precious metals. Because they blacken (sulfurize) upon reacting with sulfur in the air, care methods vary depending on whether you wish to maintain the brilliant white luster or enjoy a darkened, aged aesthetic.
Stainless Steel: Practicality and Corrosion Resistance
With excellent corrosion resistance and virtually no susceptibility to rust or tarnishing, it is widely used for daily washing and in modern tea utensils. For users who prefer the aging process of materials, it may not be the preferred choice in terms of texture.
3. Material Selection at SEKIMONO
At SEKIMONO, we have chosen copper for its calm, substantial texture when held during daily tea service and the way its patina deepens as you buff it with a cloth after use.
The pieces are hand-finished and color-treated at our partner workshop in Wuxi, Jiangsu, China, and finished with a subdued, antique patina.
Explore SEKIMONO's Copper Tea Utensils
View specifications for all 14 works, including tea scoops, lid rests, pot stands, and tea trays.
View Copper Chinese Tea UtensilsFor comparisons of textures between Zisha teapots and copper pot stands, as well as basics of arrangement using the dry brewing method, please refer to our Guide to Pairing Zisha Teapots with Copper Pot Stands.
