If your diamond ever becomes loose in its shank during resharpening, the knife will be replaced with a new one at the resharpening price. Diamonds are sharpened using the finest diamond powder and most accurate lap spindles available. Angles are measured and facets ground with 0.1 precision to insure desired orientation. Boat are made of anodized aluminum or stainless steel and fit all brands of ultramicrotomes without an adapter. Black is chosen to enhance the visibility of floating sections.
All materials are suitable for use in both cryo and room temperature applications.
The epoxies used to seal the boat and firmly hold the knife in place will not loosen or corrode and are impervious to all solvents. These epoxies are hydrophilic insuring adequate wetting of the diamond's edge during cutting. Clearance angles are preset at the factory for a microtome setting of 4 . Other clearance angles and boat colors are available upon request. DDK Diamond Knives are tested by cutting silver to blue sections and examining them with the electron microscope at 2000X and 20000X. The entire edge of every knife is tested in this way.