Our line of tungsten carbide knives are effective for plastic work, for bone and hard materials embedded in MMA, and to replace glass knives for softer tissue and materials embedded in GMA. For working with tissues embedded in glycolmethacrylate (GMA) or performing routine plastic sectioning of JB4.

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These cost effective knives offer outstanding section quality, easily cutting through a variety of densities with consistency and are unconditionally guarenteed. DDK guarentees a one-week turnaround time on new knives and start-up technical assistance through a large network of users.


Applications   Benefits
MMA Sectioning of bone and hard materials   Outstanding section quality with consistency
Frozen sections of bone and hard materials   One-week turnaround time on new knives
Composites of plastic materials with metal or fiber fillers   Technical assistance through large network of users
Arterial stents embedded in MMA   Unconditional guarantee
GMA sections of hard tissue   Productive versus hand-grinding
Study of coatings / cohesion on various material   Easily cuts through a variety of densities


100% solid high grade tungsten carbide. Recommended for: hard tissue, bone or material embedded in MMA or GMA, frozen material

Cutting edge 16 cm Cutting angles available 35°, 45°, 55°
Blade height 3.44 cm Section thickness 1-15 microns

A special cryo tungsten carbide knife is available for cryo applications. For ease of handling and use of the full 16mm edge length, the tungsten carbide blade is embedded in a steel holder. This knife is available in both C & D profiles.
Review Cryogenic Sample Prep Section


These blades are appreciated by technicians looking for improved productivity and versatility when sectioning plastic. They feature a low angle (35°) for best quality sections of soft samples. Try them for your toughest cryostat sectioning problems, too! DDK maintains an inventory of starter kits and replacement blade packs for immediate shipment, and offers start-up assistance through a network of users.

Successful Applications
Fibers in GMA 3 microns   Animal Tissues on Cryostat 3 microns
Cartilage in Paraffin 5 microns   Decalcified Bone in Paraffin 5 microns
Renal Biopsies in GMA 1.5 micron   Skin on Cryostat 7 microns
Paint Samples in GMA 3 microns   Eucalyptus Root in GMA 1 micron
Neurotox Studies in GMA 1 micron   Tumors in GMA 2 microns


Having a consistent size and tip angle, these knives successfully replace glass and razor blades in a variety of sectioning and block facing applications. The sharp edge lasts through thousands of sections, eliminating mid-procedure knife changes and frequent reordering while enhancing productivity. These knives fit tightly in the glass knife holders of most microtomes, are easy to handle and reduce the risk of cuts to your hands.

For Epon & epoxy embedded tissue and material, use this knife for routine histology and difficult jobs such as:

Serial sectioning of the cornea, mouse brains, fish embryos
Spinal cords
Section scouting
Polyester film and hard materials
Trimming / block facing
Ovaries / Fish eggs
Skin biopsies
Bone marrow biopsies and mineralized bone
Lymph nodes
Decalcified bone


Cutting edge length: .38 in. (9.6 mm)
Blade height: 1.0 in. (25.4 mm)
Blade thickness: .38 in. (9.6 mm)
Cutting angle: 40°
Material: 100% high grade, solid Tungsten Carbide
Section thickness: 2-15 microns


Delaware Diamond Knives offers a resharpening service for all tungsten carbide knives. We take your knives and restore the edges to the same quality as new with our specialized equipment and procedures. All angles are returned to factory specifications so all knives perform the same at the microtome. The aesthetic characteristics of your knife are also considered.Corrosion of tool steel parts is brushed out, epoxy joints are repaired and your box is cleaned and repaired if necessary. Each tungsten carbide knife, new or resharpened, is marked with a serial number and data regarding its characteristics is stored in our computer. Should there ever be a question about your knife's performance, give us a call. We have the information and experience necessary to answer your questions and help you with your problems. Due to the nature of the Triangular Tungsten Carbide Blade, with their high utility relative to cost, it is uneconomical to resharpen. Replacement blade packs are offered at attractive prices relative to the cost, time and space required to produce quality glass knives.