{"product_id":"nubatama-ume-25-xxxc-black-aratae","title":"Nubatama Ume #25 (XXXC Black Aratae)","description":"\u003cdiv class=\"product-description\"\u003e\n\u003cblockquote style=\"border-left: 4px solid #333; margin: 0 0 20px 0; padding: 10px 15px; background-color: #f9f9f9;\"\u003e\n\u003cstrong\u003eWhy You Need This Stone:\u003c\/strong\u003e The #25 grit is an extra-extra-extra coarse (XXXC) abrasive designed for severe metal removal, heavy reprofiling, and major edge restoration. Operating as a modern, hard-wearing interpretation of a traditional Japanese \u003cem\u003eAratae\u003c\/em\u003e (rough stone), the Ume #25 allows you to reshape damaged blades and remove deep chips rapidly on a bench stone, bypassing the need for power grinders that risk overheating the steel's temper. Formulated in a 50mm brick profile for extended shop life.\u003c\/blockquote\u003e\n\u003cp\u003e\u003cstrong\u003eBuy This Stone If:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eYou need to repair major edge chips, broken tips, or severely damaged geometries.\u003c\/li\u003e\n\u003cli\u003eYou are performing heavy thinning on thick blades or reprofiling primary bevels from scratch.\u003c\/li\u003e\n\u003cli\u003eYou want an extremely aggressive, fast-cutting coarse stone sourced from the Ken Schwartz Estate collection.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr style=\"border: 0; border-top: 1px solid #eee; margin: 20px 0;\"\u003e\n\u003ch4\u003eSpecifications\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Nubatama\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrit:\u003c\/strong\u003e #25 (Extra-Extra-Extra Coarse \/ XXXC)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e Ume (Black Aratae)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Soaking \/ Semi-Soaking\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions \/ Profile:\u003c\/strong\u003e 210 x 75 x 50mm Brick\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBinder Hardness:\u003c\/strong\u003e Medium-Hard\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProvenance:\u003c\/strong\u003e Ken Schwartz Estate\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eNotes \u0026amp; Usage\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCommon Tasks:\u003c\/strong\u003e\u003cul\u003e\n\u003cli\u003eGrinding out deep edge chips, broken tips, and severe blade geometry damage.\u003c\/li\u003e\n\u003cli\u003eHeavy thinning behind the edge on thick, unmaintained kitchen or shop tools.\u003c\/li\u003e\n\u003cli\u003eRapidly resetting bevel angles before transitioning to a standard coarse stone.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Action \u0026amp; Speed:\u003c\/strong\u003e Utilizes large, highly aggressive silicon carbide grit particles to shear through steel rapidly. It creates a coarse, dark slurry that accelerates material removal while keeping the cut consistent.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSurface Feedback:\u003c\/strong\u003e Very tactile with an aggressive, audible \"bite.\" The stone provides immediate feedback on high spots along the bevel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSteel Compatibility:\u003c\/strong\u003e Works across almost all metal types, including tough stainless alloys, carbon steels, and hard tool steels.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eProgression Ideas\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePreceding Step (Lower Grit):\u003c\/strong\u003e None (this is typically the coarsest bench stone step available in a hand-sharpening setup).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFollowing Step (Higher Grit):\u003c\/strong\u003e Nubatama Ume #120 or Bamboo #150 (to erase the extremely coarse #25 scratch pattern before moving to medium repair grit).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eAlso Consider\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFor Moderate Repair Work:\u003c\/strong\u003e If you only need to fix light chips or perform routine edge restoration, consider a milder coarse stone like the \u003cstrong\u003eNubatama Ume #120\u003c\/strong\u003e or \u003cstrong\u003eBamboo #320\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEssential Maintenance:\u003c\/strong\u003e Because of the large grit size, keep a heavy-duty coarse flattening plate or dressing stone nearby to refresh the surface and maintain flatness during heavy grinding sessions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCondition\u003c\/h4\u003e\n\u003cp\u003eNew in original factory box and packaging. Due to long-term storage (5+ years), outer boxes and paper wrapping may show minor shelf wear or scuffing.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eNote: Photos represent our stock inventory for this stone; individual box wear or color tone may vary slightly from the unit pictured. Reference objects (rulers, coins) are for scale only and are not included.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Pacific Waterstone","offers":[{"title":"Complete","offer_id":48045175668894,"sku":"NUB-UME-25-INDIVIDUAL-1","price":60.21,"currency_code":"USD","in_stock":true},{"title":"Missing Lid","offer_id":48045175701662,"sku":"NUB-UME-25-INDIVIDUAL-2","price":60.21,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0785\/1386\/4862\/files\/ume_logo.png?v=1785129107","url":"https:\/\/pacificwaterstone.com\/products\/nubatama-ume-25-xxxc-black-aratae","provider":"Pacific Waterstone","version":"1.0","type":"link"}