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Whetstones wear hollow with use, and a hollow stone cannot give a straight edge. Rub this grooved stone across the surface to bring it flat again.
It is a coarse 320 grit block of silicon carbide, as long as a standard whetstone. The diagonal grooves carry the slurry away as you work. Use with water.
In the box: one flattening stone, 180 × 60 × 28 mm.
Good to know: for water stones, such as the two in our Whetstone Set. It flattens stones. It does not sharpen knives.
Delivery: free to UK addresses, in 7 to 10 working days. Delivery details.
Returns: you have 30 days from delivery to send it back, unused. Returns and refunds.
Guarantee: 2 years, in addition to your statutory rights.
1. Draw a pencil grid across the face of your whetstone.
2. Wet both stones. If your whetstone needs soaking, soak it first.
3. Lay the whetstone flat, in its base or on a damp cloth, so it cannot slide.
4. Place the flattening stone on it, grooved face down. Rub back and forth and in small circles, with light, even pressure. Cover the whole surface, edges included.
5. Rinse and look at the grid. Where pencil remains, the stone is still low. Carry on until the grid has gone everywhere.
6. Rinse both stones and let them dry before you put them away.
A question before or after you order? Write to us and we will get back to you.
Why it matters
A whetstone wears hollow in the middle. On a hollow stone you cannot hold the same angle along the blade, so the edge comes out uneven.
The reason
Every stroke wears a whetstone a little, mostly in the middle. Over time it turns hollow. A hollow stone changes the angle as the blade moves along it. Flattening puts the surface back to level, so every part of the edge meets the stone the same way.
The details
It brings the surface of a whetstone back to flat. Whetstones wear unevenly with use, and a flat surface is what lets you hold a steady angle.
Draw a pencil grid on it and rub it with the flattening stone. If pencil remains in the middle, the stone was hollow there. A straight ruler laid across the stone shows it too.
It depends on how much you sharpen. For most home cooks, a check every few months is enough.
Wet both stones. Rub the grooved face over the whetstone, back and forth and in small circles, until the pencil grid has gone everywhere. Then rinse both.
Water stones, such as the two in our Whetstone Set. At 180 mm it is as long as a standard whetstone.
Delivery is free in the UK and takes 7 to 10 working days. If you change your mind, you have 30 days to send it back unused, and it comes with a 2-year guarantee.
Flattening Stone
£28.00
