850x290mm 120 Grit Diamond Sandpaper Sheet – Abrasive Grinding Sheet for Glass, Stone & Lapidary Polishing

The 850x290mm 120 Grit Flexible Diamond Sandpaper Sheet is an extra-long industrial electroplated diamond abrasive blanket engineered for stroke sanders, long platen hand sanders, and wide-area medium surface refinement across glass, natural stone, porcelain, and ceramic materials.

Key Features

• Extended 850x290mm (33.5" x 11.4") Dimension: Extra-large format offers generous working surface area for wide stroke sanding blocks, continuous platen wrapping, or custom cutting into custom discs, strips, and belts.
• Medium 120-Grit Diamond Matrix: Bridges the gap between coarse stock removal and fine pre-polishing, quickly removing coarse grinding marks while leaving an even, uniform surface.
• Flexible Tear-Resistant Cloth Backing: Reinforced waterproof substrate conforms smoothly to curved workpieces, platen beds, and hand blocks without cracking or tearing.
• Wet & Dry Versatility: Fully waterproof backing supports continuous wet sanding with water coolant for dust suppression and extended diamond life.

Applications

• Architectural Glass & Mirrors: Edge smoothing, seam refinement, and scratch removal after rough cutting on thick glass slabs and panels.
• Lapidary & Gemstones: Medium cabochon pre-finishing, slab scratch removal, and contour smoothing on agate, jade, jasper, and quartz.
• Ceramic & Porcelain: Precision edge smoothing and scratch elimination on ceramic, porcelain, and composite materials.

Technical Specifications

• Dimensions: 850 mm x 290 mm (33.5" x 11.4")
• Grit: 120 Grit (Medium General Shaping / Scratch Refining)
• Bond Type: Electroplated Diamond
• Backing: Flexible Waterproof Cloth
• Operating Method: Wet use recommended (water coolant)

Operating Guidelines

• Use with continuous water coolant or frequent water dipping to maintain cool operating temperatures and flush grinding swarf.
• Rinse clean after use and lay flat to dry to preserve substrate flexibility and diamond integrity.