Dr. Marv Fine Diamond Sharpening Stones [2.5, 1, 0.5 µm]

Dr. Marv's Scientific Sharpening Stones, Fine Set. Resin-bond diamond stones, handmade by Dr. Marv in the German Alps, in the 1" x 6" size for fixed-angle sharpeners.

What it's for

The finishing end of the progression: polishing the bevel and refining the apex.

What's in the set

• 2.5 µm
• 1 µm
• 0.5 µm

Stones are rated by their nominal diamond particle size in microns (µm), the way Dr. Marv tests and publishes them.

How they're made

• Diamond abrasive in a resin bond on a black anodized aluminum blank
• Each surface is dressed with a single-point diamond chisel instead of conventional flattening
• Use with a honing oil, which is how Dr. Marv tests his stones

From Dr. Marv's testing

In his own review on M398 steel, the 2.5 µm stone left the bevel with a polished look and no visible burr at the magnifications he used. Read his 2.5 µm study.

Message from Dr. Marv

1x Stone 2.5 μm
1x Stone 1 μm
1x Stone 0.5 μm
Size of the Aluminum Blank: 159 x 25 mm x 3 mm
Size of the Abrasive Layer: 150×25 + At least 4 mm thickness
Diamond Concentration: >40% by weight!

Factory Dressed via contamination free single point diamond chiselling. Comes in a storage box.

These are the Dr. Marv’s Scientific Sharpening Stones. They have anunheard of concentration and are absurdly pure and contamination free.This was achieved by very tight, electron microscopy quality control,followed by manufacturing in a laminar flow box. Dressing is done via singlepoint diamond chiseling, which also stops any contamination. Moreover,every set is diamond chiseled individually in the same fixture, so thestones are very, very close in their thickness. I personally do not feel theneed to adjust the angle when switching from one stone to the next.

Their development is based on my scientific research into abrasives. Ifirmly believe that these are super high performing abrasives!

I am very proud to say that the resin, filament, foam, chemicals andaluminium are Made in Germany. Machining of the aluminium blanks wasdone in Germany. Only the diamond is imported, but meticulously qualitycontrolled via SEM. I am absurdly proud to state that all abrasive stonesare handmade by me in the German Alps.

As this is a handmade product, some small blemishes such as tinybubbles, scratches or imperfections are to be expected. I can promisethat they do not subtract from the performance of the sharpening stones!