{"product_id":"iridescent-stainless-cutlery-set-iroai","title":"Iridescent Stainless Cutlery Set","description":"\u003c!-- ① 冒頭ラベル --\u003e\n\u003cp style=\"font-size: 13px; letter-spacing: 0.12em; text-transform: uppercase; color: rgba(2,9,18,0.4); margin: 0 0 20px;\"\u003eIridescent stainless cutlery · Oxide coloring · Nakano Kagaku · Tsubame, Niigata\u003c\/p\u003e\n\u003c!-- ② キャッチフレーズ --\u003e\n\u003cdiv style=\"display: flex; flex-direction: column; margin: 0 0 32px;\"\u003e\n\u003cdiv style=\"display: flex; align-items: baseline; gap: 16px; padding: 13px 0; border-bottom: 0.5px solid rgba(2,9,18,0.1);\"\u003e\n\u003cspan style=\"font-size: 11px; letter-spacing: 0.12em; color: rgba(2,9,18,0.25); min-width: 20px;\"\u003e01\u003c\/span\u003e \u003cspan style=\"font-size: 15px; line-height: 1.6; color: rgba(2,9,18,0.75);\"\u003eColor produced by light interference — the same physics as a soap bubble, applied to stainless steel.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: baseline; gap: 16px; padding: 13px 0; border-bottom: 0.5px solid rgba(2,9,18,0.1);\"\u003e\n\u003cspan style=\"font-size: 11px; letter-spacing: 0.12em; color: rgba(2,9,18,0.25); min-width: 20px;\"\u003e02\u003c\/span\u003e \u003cspan style=\"font-size: 15px; line-height: 1.6; color: rgba(2,9,18,0.75);\"\u003eNo dye, no paint, no coating — fully recyclable, and safe in the mouth.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: baseline; gap: 16px; padding: 13px 0;\"\u003e\n\u003cspan style=\"font-size: 11px; letter-spacing: 0.12em; color: rgba(2,9,18,0.25); min-width: 20px;\"\u003e03\u003c\/span\u003e \u003cspan style=\"font-size: 15px; line-height: 1.6; color: rgba(2,9,18,0.75);\"\u003eTens of thousands of tests to achieve colors that are precise, repeatable, and stable over time.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- ③ 本文 --\u003e\n\u003cp style=\"font-size: 16px; line-height: 1.9; color: rgba(2,9,18,0.75); margin: 0 0 16px;\"\u003e\u003cstrong\u003eColor that lives inside the metal\u003c\/strong\u003e\u003cbr\u003eIROAI's colors are not applied to the surface — they emerge from within it. The technique is called oxide coloring: by precisely controlling the thickness of the naturally occurring transparent oxide film on stainless steel (between 0.1 and 0.3 microns — roughly one ten-thousandth of a millimeter), different wavelengths of light are reflected or cancelled. The result is iridescent color, shifting subtly with the angle of view — the same optical principle that makes a soap bubble appear to glow with multiple colors at once.\u003c\/p\u003e\n\u003cp style=\"margin: 0 0 4px;\"\u003e\u003cimg alt=\"IROAI cutlery — dye-free, paint-free, safe and recyclable\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0018\/1878\/7915\/files\/K4A9807.jpg?v=1733299135\"\u003e\u003c\/p\u003e\n\u003cp style=\"font-size: 14px; line-height: 1.8; color: rgba(2,9,18,0.65); margin: 0 0 24px; text-align: right;\"\u003eColor without dye or paint — safe, stable, and recyclable\u003c\/p\u003e\n\u003cp style=\"font-size: 16px; line-height: 1.9; color: rgba(2,9,18,0.75); margin: 0 0 16px;\"\u003eBecause the color is structural rather than applied, it does not peel, fade under UV exposure, or degrade over time. The pieces can be recycled at end of life in the same way as any other stainless steel product — no separation of coating or treatment is required.\u003c\/p\u003e\n\u003cp style=\"font-size: 16px; line-height: 1.9; color: rgba(2,9,18,0.75); margin: 0 0 16px;\"\u003e\u003cstrong\u003eTwo finishes — two different qualities of light\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"font-size: 16px; line-height: 1.9; color: rgba(2,9,18,0.75); margin: 0 0 8px;\"\u003e\u003cstrong\u003eMirror\u003c\/strong\u003e\u003cbr\u003eThe metal surface is polished to a mirror finish by craftspeople in Tsubame-Sanjo, Niigata — Japan's foremost cutlery manufacturing region. The oxide coloring is then applied over this reflective base, producing colors that appear light and luminous, shifting like a rainbow across the surface. Smooth to the touch at the lip.\u003c\/p\u003e\n\u003cp style=\"margin: 0 0 4px;\"\u003e\u003cimg alt=\"IROAI Mirror Ao\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0018\/1878\/7915\/files\/product_iroai_img06.jpg?v=1733363506\"\u003e\u003c\/p\u003e\n\u003cp style=\"font-size: 14px; line-height: 1.8; color: rgba(2,9,18,0.65); margin: 0 0 24px; text-align: right;\"\u003eMirror — Blue\u003c\/p\u003e\n\u003cp style=\"font-size: 16px; line-height: 1.9; color: rgba(2,9,18,0.75); margin: 0 0 8px;\"\u003e\u003cstrong\u003eMatte\u003c\/strong\u003e\u003cbr\u003eA proprietary surface treatment creates a fine matte texture before the oxide coloring is applied. The result is deeper, quieter color — the same hues read with more depth and less flash. Works equally well alongside natural wood tableware, lacquerware, or contemporary ceramics.\u003c\/p\u003e\n\u003cp style=\"margin: 0 0 4px;\"\u003e\u003cimg alt=\"IROAI Matte Ao\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0018\/1878\/7915\/files\/product_iroai_img07.jpg?v=1733363570\"\u003e\u003c\/p\u003e\n\u003cp style=\"font-size: 14px; line-height: 1.8; color: rgba(2,9,18,0.65); margin: 0 0 24px; text-align: right;\"\u003eMatte — Blue\u003c\/p\u003e\n\u003cp style=\"margin: 0 0 4px;\"\u003e\u003cimg alt=\"IROAI Matte — full color range\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0018\/1878\/7915\/files\/DSC6777_20181019.jpg?v=1733363144\"\u003e\u003c\/p\u003e\n\u003cp style=\"font-size: 14px; line-height: 1.8; color: rgba(2,9,18,0.65); margin: 0 0 24px; text-align: right;\"\u003eIROAI Matte — no dye or paint used\u003c\/p\u003e\n\u003cp style=\"font-size: 16px; line-height: 1.9; color: rgba(2,9,18,0.75); margin: 0 0 16px;\"\u003e\u003cstrong\u003eTens of thousands of tests to get the color right\u003c\/strong\u003e\u003cbr\u003eThe underlying technique was first developed in the United Kingdom in 1972. It has been known for decades, but rarely used in practical products — because controlling the color with precision is extremely difficult. There is no textbook for this application. The process cannot be easily replicated.\u003c\/p\u003e\n\u003cp style=\"font-size: 16px; line-height: 1.9; color: rgba(2,9,18,0.75); margin: 0 0 16px;\"\u003eNakano Kagaku, a surface finishing specialist based in Tsubame, Niigata, has been working on surface treatment technology for over 60 years. Using this accumulated knowledge as a foundation, they developed their own proprietary oxide coloring process. The number of test records accumulated in the process of making IROAI's colors repeatable and precise runs into the tens of thousands.\u003c\/p\u003e\n\u003cp style=\"font-size: 16px; line-height: 1.9; color: rgba(2,9,18,0.75); margin: 0 0 32px;\"\u003eEach color in the IROAI lineup appears only when the material selection, the polishing standard, and the oxide treatment conditions align exactly. The iridescent result is not a shortcut — it is the endpoint of considerable accumulated effort.\u003c\/p\u003e\n\u003c!-- ⑥ Specificationsブロック --\u003e\n\u003cdiv style=\"border-top: 1px solid rgba(2,9,18,0.1); padding-top: 24px; margin-bottom: 24px;\"\u003e\n\u003cp style=\"font-size: 12px; letter-spacing: 0.1em; text-transform: uppercase; color: rgba(2,9,18,0.4); margin: 0 0 12px;\"\u003eSpecifications\u003c\/p\u003e\n\u003cp style=\"font-size: 14px; line-height: 1.8; color: rgba(2,9,18,0.65); margin: 0;\"\u003eMaterial: Stainless steel\u003cbr\u003eSet contents: Dinner spoon · teaspoon · dinner fork · dessert fork (1 each · 4 pieces total)\u003cbr\u003eFinish: Mirror or Matte\u003cbr\u003eColors: Green · Purple · Black · Yellow · Blue\u003cbr\u003eAll colors produced by oxide treatment — no dye, no paint\u003cbr\u003e\u003cbr\u003eDinner spoon: W 1.6 × L 7.3 in (40 × 186 mm) · 2.1 oz (60 g)\u003cbr\u003eTeaspoon: W 1.1 × L 5.3 in (28 × 134 mm) · 1.1 oz (30 g)\u003cbr\u003eDinner fork: W 0.9 × L 7.4 in (23 × 188 mm) · 1.8 oz (50 g)\u003cbr\u003eDessert fork: W 0.7 × L 5.4 in (17 × 138 mm) · 0.9 oz (25 g)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- ⑦ Shippingブロック --\u003e\n\u003cdiv style=\"border-top: 1px solid rgba(2,9,18,0.1); padding-top: 24px; margin-bottom: 24px;\"\u003e\n\u003cp style=\"font-size: 12px; letter-spacing: 0.1em; text-transform: uppercase; color: rgba(2,9,18,0.4); margin: 0 0 12px;\"\u003eShipping\u003c\/p\u003e\n\u003cp style=\"font-size: 14px; line-height: 1.8; color: rgba(2,9,18,0.65); margin: 0;\"\u003eShips within 10 days · Shipping cost included in price\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- Careブロック --\u003e\n\u003cdiv style=\"border-top: 1px solid rgba(2,9,18,0.1); padding-top: 24px; margin-bottom: 24px;\"\u003e\n\u003cp style=\"font-size: 12px; letter-spacing: 0.1em; text-transform: uppercase; color: rgba(2,9,18,0.4); margin: 0 0 12px;\"\u003eCare\u003c\/p\u003e\n\u003cp style=\"font-size: 14px; line-height: 1.8; color: rgba(2,9,18,0.65); margin: 0;\"\u003eWash with neutral detergent. Do not use bleach, acidic, or alkaline cleaners.\u003cbr\u003eUse a soft sponge only — abrasive materials or hard scrubbers will scratch the surface.\u003cbr\u003eDishwasher safe; secure pieces so they do not knock against each other during the cycle. Use a neutral dishwasher detergent.\u003cbr\u003eThe color is produced by the oxide film on the stainless surface and will not peel. It is also resistant to UV degradation and fading.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- Noteブロック --\u003e\n\u003cdiv style=\"border-top: 1px solid rgba(2,9,18,0.1); padding-top: 24px;\"\u003e\n\u003cp style=\"font-size: 12px; letter-spacing: 0.1em; text-transform: uppercase; color: rgba(2,9,18,0.4); margin: 0 0 12px;\"\u003eNote\u003c\/p\u003e\n\u003cp style=\"font-size: 14px; line-height: 1.8; color: rgba(2,9,18,0.65); margin: 0;\"\u003eLike a soap bubble, the color shifts subtly depending on the angle of view. What may appear as slight variation across the surface is a natural characteristic of the oxide coloring technique — not a defect.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Nakano Kagaku","offers":[{"title":"Mirror \/ Yellow","offer_id":40706736029825,"sku":null,"price":13000.0,"currency_code":"JPY","in_stock":true},{"title":"Mirror \/ Green","offer_id":40706736062593,"sku":null,"price":13000.0,"currency_code":"JPY","in_stock":true},{"title":"Mirror \/ Purple","offer_id":40706736095361,"sku":null,"price":13000.0,"currency_code":"JPY","in_stock":true},{"title":"Mirror \/ Blue","offer_id":40706736128129,"sku":null,"price":13000.0,"currency_code":"JPY","in_stock":true},{"title":"Mirror \/ Black","offer_id":40706736160897,"sku":null,"price":13000.0,"currency_code":"JPY","in_stock":true},{"title":"Matte \/ Yellow","offer_id":40706736193665,"sku":null,"price":18000.0,"currency_code":"JPY","in_stock":true},{"title":"Matte \/ Green","offer_id":40706736226433,"sku":null,"price":18000.0,"currency_code":"JPY","in_stock":true},{"title":"Matte \/ Purple","offer_id":40706736259201,"sku":null,"price":18000.0,"currency_code":"JPY","in_stock":true},{"title":"Matte \/ Blue","offer_id":40706736291969,"sku":null,"price":18000.0,"currency_code":"JPY","in_stock":true},{"title":"Matte \/ Black","offer_id":40706736324737,"sku":null,"price":18000.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/3573\/7729\/files\/K4A9819.png?v=1777437911","url":"https:\/\/byemotion-intl.com\/products\/iridescent-stainless-cutlery-set-iroai","provider":"By Emotion International","version":"1.0","type":"link"}