Jende 10×4 Glass Lapping Plate with Silicone Carbide Powders - Complete Guide

The Jende Double-Sided Glass Lapping Plate measures a generous 10″ x 4″ and includes coarse, medium, and fine silicon carbide lapping powders for versatile stone maintenance. Crafted from ½″ thick float glass, it features two functional surfaces. One side is etched for use with lapping powders to efficiently flatten sharpening stones, while the opposite side is perfectly smooth and flat for precision work.

The etched side has 0.5 mm deep grooves, making it more aggressive for lapping. These grooves also help channel swarf away, reducing stiction especially when working with finer grit stones. The smooth side accommodates a half-width sheet of full-size sandpaper or lapping film, and can also serve as a reference plate for flattening knives, chisels, and plane blades.

Using the Lapping Side

• Lightly wet the glass surface (avoid pooling water).

• Evenly sprinkle the desired grit of lapping powder.

• Pre-soak your sharpening stone if required.

• Draw a pencil grid on the stone’s surface.

• Lap using even pressure in an X pattern until the pencil marks disappear.

Using the Reference Side

• Cut sandpaper or lapping film to size.

• Fold one edge to create a small lip and secure it under the plate if needed.

• Wet/dry sandpaper or films can be held in place with a small drop of water.

• Use the flat surface for precision flattening and finishing work.

This dual-purpose design makes the Jende Glass Lapping Plate an excellent solution for flattening stones, preparing edges, and maintaining accurate sharpening surfaces.

Using the Jende 10×4 Glass Lapping Plate is straightforward, and once you’ve done it a couple of times, it becomes part of your regular sharpening routine. The etched side of the plate is designed to work with silicon carbide powders to quickly and evenly flatten your sharpening stones.

Start by placing the glass plate on a stable, flat surface. Lightly wet the etched side with water — you only need a thin film, not standing water. Too much water will cause the powder to float and reduce its cutting efficiency.

Next, sprinkle a small amount of silicon carbide powder evenly across the surface. A little goes a long way, so there’s no need to overdo it. Choose the grit based on how uneven your stone is — coarse for heavy flattening, medium for regular maintenance, and fine for finishing.

If your sharpening stone requires soaking, do that beforehand. Once ready, draw a light pencil grid across the surface of the stone. This grid acts as a visual guide and helps you see when the stone becomes perfectly flat.

Place the stone on the plate and move it in a gentle X pattern, applying even pressure. The goal is to use the full surface of the plate while keeping your movements smooth and controlled. As you lap, the silicon carbide powder will begin cutting the high spots on the stone.

Continue lapping until all the pencil marks disappear. This indicates the surface is flat. If needed, you can add a few drops of water or a pinch more powder during the process.

When finished, rinse both the stone and the plate thoroughly to remove any remaining abrasive particles. This prevents contamination when switching to finer grit stones. With regular use, the Jende Glass Lapping Plate keeps your sharpening stones flat, which helps maintain consistent angles and improves sharpening performance.

Jende 10×4 Glass Lapping Plate with Silicone Carbide Powders