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Professional-Grade Lubrication for a Frictionless Edge Sharpening is a game of heat and friction management. Without the correct lubricant, even the highest-quality sharpening stone will eventually 'glaze'—a process where microscopic metal particles, known as swarf, become embedded in the stone's pores, rendering it useless. Norton 16 oz. Sharpening Stone Lubricant is engineered specifically to prevent this failure, ensuring your India or Crystolon stones remain aggressive and effective for years. The Science of Swarf Suspension This highly refined mineral oil is formulated with a specific viscosity that lifts metal filings off the stone’s surface during the sharpening stroke. By keeping these particles in suspension, the oil prevents them from clogging the abrasive grit. Unlike generic oils or lower-grade lubricants, this Norton formula is processed to meet strict United States Pharmacopoeia (USP) standards. This means it is entirely food-safe, a non-negotiable requirement for professional chefs, butchers, and home cooks who sharpen their tools in the same environment where they prep food. Why Professionals Choose Norton In high-volume environments like butcher shops or industrial kitchens, speed and hygiene are paramount. This oil does not cake, thicken, or turn rancid over time. It remains fluid, allowing for easy cleanup with a simple wipe. Whether you are performing a heavy repair on a coarse Crystolon stone or finishing a delicate edge on a Fine India oil stone, this lubricant provides the thermal stability needed to prevent localized heat buildup, which can temper the steel and ruin a blade’s hardness. Made in the USA, it represents the gold standard for traditional oil-stone maintenance. Learn More