View Cart || Request a 2021 Catalog

Electron Microscopy Sciences

Specimen Preparation and Embedding Supplies

arrow13Glass Knife & Ultramicrotomy Supplies

GKM-2 Glass Knifemakerarrow12GKM-2 Glass Knifemaker

For the highest quality glass knives, utilizing the "balanced break" method.

Features & Benefits

  • Solid, heavy design
  • Easily produces controlled, consistent breaks
  • Digital readout displays applied load as breaking arm is moved
  • Produces knives up to 8 mm wide
  • "Balanced Break" method for the sharpest knives
  • Micrometer positioners
  • Built-in stops for easy positioning
  • Precision mechanics supports "Slow-Break" technique

Taking the guesswork out of glass knife making...

The GKM 2 was developed to produce superior-quality glass knives utilizing the balanced break technique. For reproducible results, two aspects of the breaking procedure must be measurably controlled: position and load. The positioning of the glass on the GKM 2 is controlled by precision micrometers. The breaking pressure is controlled by the constant feedback displayed on the digital readout as the clamping handle and breaking arm are adjusted. This allows the minimum load possible to break the glass, producing long, straight edges.

The "balanced break" method requires an equal length of glass on both sides of the score, along with a mechanism that applies equal load to both sides, resulting in a straight break through the glass. This is crucial since this newly-formed edge becomes the actual knife edge.

The components of the GKM 2 body are precision-machined from solid metal, providing a stable platform for this exacting technique. Alignment is secured by a locking mechanism to maintain your desired settings.

Pressure sensor and digital display enable the operator to produce accurate knives with each controlled break. Precision micrometers accurately position glass squares for the final break into knives.

Combined, the solid platform, micrometer positioners, and digital load readout all contribute to reliably producing the sharpest knives.

The GKM 2 is designed to handle glass strips from 6 mm to 8 mm, and 10 mm in thickness and 25 mm wide, with mechanical stops to produce 25 mm glass squares easily. It also makes consistent "slow breaks" desired to produce the best knives for cryosectioning.

An instructional video with details on how to make consistent, high quality glass knives with the GKM 2 is included.


Dimensions (mm) Weight
360 W x 160 H x 170 D 13.6 kg

Ordering Information

76011 GKM-2 Glass Knifemaker
Includes: safety glasses, brush, instruction manual & video, replacement scoring wheels and axle, package of (30) 6 mm glass strips: 6 mm x 1" x 16" (25.4 mm x 406 mm)
each 12,500.00 Add to Cart

Glass Knife Making Pliersarrow12Glass Knife Making Pliers

These pliers are specially designed with its jaws ground to a special shape for ease of preparation when making glass knives.

62190-01 Glass Knife Making Pliers each 212.00 Add to Cart

Glass Knife Scoring Jigarrow12Glass Knife Scoring Jig

These set of jigs assist in the production of making glass knives by hand. T-square jig: when the edge of this jig is placed against the edge of the glass knife strip the subsequent score will be 26 mm or 1" long. After breaking, the square of the glass can be scored at a 45 degree angle by using the other jig.

62192-02 Glass Knife Scoring Jig each 102.00 Add to Cart

Diamond Glass Cutter arrow12Diamond Glass Cutter

Metal parts are made from nickel-plated brass, set into a maple handle. The rack can be used to crack single or double strength glass.

70038 Diamond Glass Cutter each 98.00 Add to Cart

LKB Knifemaker Repair Kitarrow12LKB Knifemaker Repair Kit

A repair kit for the LKB Knifemaker.


  • 1 replacement cutter wheel
  • 1 replacement damping pad
  • 1 replacement knife alignment guide
EMS068 LKB Knifemaker Repair Kit each 88.40 Add to Cart

Glass Knife Stripsarrow12Glass Knife Strips

Specially selected glass strips for making glass knives. Its hardness produces a durable and sharp edge suitable for thick, semi thin, or ultrathin sections.

arrow12Leica Glass
7890-04 Size 6.4 mm x 25.4 mm x 400 mm 30 strips/pk 215.00 Add to Cart
7890-08 Size 8 mm x 25.4 mm x 400 mm 24 strips/pk 218.00 Add to Cart
2078-110 Size 10 mm x 25.4 mm x 400 mm 18 strips/pk 262.00 Add to Cart
arrow12Ultramicrotomy Grade
12345 Size 6 mm x 25.4 mm x 406 mm 30 strips/pk 220.00 Add to Cart
12346 Size 6 mm x 38.1 mm x 406 mm 20 strips/pk 215.00 Add to Cart
71012 Size 6.4 mm x 25 mm x 400 mm 30 strips/pk 215.00 Add to Cart
12348 Size 6 mm x 50.8 mm x 203 mm 50 strips/pk 220.00 Add to Cart
12349 Size 6 mm x 25.4 mm x 203 mm 24 strips/pk 105.00 Add to Cart
12350-6 Size 6 mm x 25.4 mm x 203 mm 6 strips/pk 34.00 Add to Cart
12351-6 Size 6 mm x 38.1 m m x 203 mm 6 strips/pk 38.00 Add to Cart
71013 Size 8 mm x 25 mm x 400 mm 24 strips/pk 218.00 Add to Cart
12353 Size 8 mm x 25.4 mm x 203 mm 24 strips/pk 124.00 Add to Cart
71014 Size 10 mm x 25 mm x 400 mm 18 strips/pk 250.00 Add to Cart
12355 Size 10 mm x 25.4 mm x 203 mm 20 strips/pk 163.00 Add to Cart
12356 Size 10 mm x 25.4 mm x 203 mm 24 strips/pk 195.00 Add to Cart
12357 Size 10 mm x 50.8 mm x 203 mm 30 strips/pk 216.00 Add to Cart
12358 Size 10 mm x 50.8 mm x 101 mm 24 strips/pk 105.00 Add to Cart
12359 Size 12 mm x 50.8 mm x 203 mm 25 strips/pk 265.00 Add to Cart
12360 Size 12 mm x 25.4 mm x 203 mm 16 strips/pk 215.00 Add to Cart
71015 Size 12 mm x 50 mm x 100 mm 16 strips/pk 150.00 Add to Cart
arrow12Histology Grade
12362 Size 6 mm x 25.4 mm x 406 mm 30 strips/pk 165.00 Add to Cart
12363 Size 6 mm x 38 mm x 406 mm 20 strips/pk 165.00 Add to Cart
71016 Size 6.4 mm x 25 mm x 400 mm 30 strips/pk 160.00 Add to Cart
12365 Size 6 mm x 38 mm x 400 mm 20 strips/pk 165.00 Add to Cart
12366 Size 6 mm x 25.4 mm x 203 mm 32 strips/pk 94.00 Add to Cart
12367 Size 6 mm x 25.4 mm x 203 mm 12 strips/pk 46.00 Add to Cart
12368 Size 6 mm x 38.1 mm x 203 mm 12 strips/pk 52.00 Add to Cart
12369 Size 6 mm x 38.1 mm x 203 mm 20 strips/pk 89.00 Add to Cart
71017 Size 8 mm x 25 mm x 400 mm 24 strips/pk 165.00 Add to Cart
71018 Size 10 mm x 25 mm x 400 mm 18 strips/pk 220.00 Add to Cart
Triangular Tungsten Carbide Knife

arrow12Triangular Tungsten Carbide Knife

These knives will fit most any ultramicrotomes and take the place of using glass knives. Perfect for trimming blocks, block facing, and for sectioning hard samples. The quality is comparable to glass knives.


Cutting edge length 38" (9.6 mm)
Blade height 1.0" (25.4 mm)
Blade thickness 38" (9.6 mm)
Cutting angle 40°
Material 100% high grade, solid Tungsten Carbide
Section thickness 2-15 microns
71019-10 Triangular Tungsten Carbide Knife 3/pk 450.00 Add to Cart

EMS Ultra-Microtome Aidarrow12EMS Ultra-Microtome Aid

Made from hard plastic (Delrin®) with a beautifully machined finish to handle many of your instruments that need to be at your fingertips during sectioning.

This EMS Ultra-microtome Aid is a safe place to rest your diamond knife, diamond trimming tool, tweezers, hair curl or eye lash, diamond knife cleaning rods, perfect-loop for picking up sections.

Note: This unit is not a safe device to store your sectioning knives, such as diamond or glass knives, after you're finished with the sectioning.

70612 EMS Ultramicrotome Aid each 325.00 Add to Cart

Finger Cots; Latexarrow12Finger Cots; Latex

Inexpensive, expandable finger cots. Seamless. Protective dexterity without covering the entire hand. Powderless, non-rolled. 3 ½ mil (0.0030"), 2 ¾"(40 mm) L.

71130 Latex Finger Cots Small 1 gross/pk 6.50 Add to Cart
71131 Latex Finger Cots Medium 1 gross/pk 7.00 Add to Cart
71132 Latex Finger Cots Large 1 gross/pk 7.50 Add to Cart

Diamond Knife Washarrow12EMS Diamond Knife Wash

This new concept of washing the Diamond knives using magnetic stirring action (with special stirring bar) gives you a fast, clean and safe method to remove particles that are left on the knives edge after sectioning.

Since most of the EM labs already have stirring plates, the Diamond Knife Wash has been designed for use with your existing unit, saving you the need to purchase an extra one. It is universal and can be used for all type and brands of Diamond Knives, including the Diatome Histo Knife.

Warning: Never use on a hot plate. If used on a combination Stirrer/Hot Plate, make sure the heat is off.

70605 Diamond Knife Wash each 235.00 Add to Cart

msdsDental Wax Sheets arrow12Dental Wax Sheets

Pink wax is a hard and thick wax sheet that is ideal for mincing and cutting tissues. Red wax is no longer available.

Approximately 31 to 35 sheets per pound.

72660 Pink Dental Wax 1lb/bx 24.00 Add to Cart
72670 Pink Dental Wax 5lb/bx 102.00 Add to Cart

Technical Tip

Dental Wax to Make Trufs

Downloadable PDFHot Pen - Wax PenHot Pen - Wax Pen; A Tool for Separating Sectionsarrow12Hot Pen - Wax Pen; A Tool for Separating Sections

Powered by AA batteries. This pen helps to flatten and separate tissue sections and reduces compression in thin sections.

Available in two models: Wax Pen 1 is powered by one AA battery; Wax Pen 2 is powered by two AA batteries. Both pens are using the same tip. Replacement tip (Cat. #72679-RT) is a straight one. Replacement tip (Cat. #72679-03) is a set of three different configurations: Straight, Hook, and "U" Shaped Tips.

Cat # Length with Tip w/o w/Cap Diameter      
72678 Wax Pen 1 6½" 6¾" ¾", 18 mm each 28.00 Add to Cart
72679 Wax Pen 2 8¼" 8¾" ¾", 18 mm each 32.00 Add to Cart
72679-RT Replacement Tip       each 6.00 Add to Cart
72679-03 Replacement Tips       set of 3 18.00 Add to Cart

technical data sheetPortable Heat Pen; Soldering Ironarrow12Portable Heat Pen; Soldering Iron

This portable heat pen is able to heat up to 700°C and automatically recharges every time it is placed back into its recharging stand. It will last approximately 40 minutes on a full charge. Tip length 1". It is useful for the sealing of wax onto glass knife boats and small soldering jobs around the lab. The set includes the heat pen and recharging stand.

72677-10 Portable Heat Pen Set each 74.00 Add to Cart
72677-50 Replacement Fine Tip each 8.00 Add to Cart
72677-51 Replacement Heavy Tip each 8.00 Add to Cart

msdsNail Polish; Cleararrow12Nail Polish; Clear

Used for sealing the boats made from tape to the glass knives.

72180 Nail Polish ½ oz 2.50 Add to Cart

Absorbent Paper Pointsarrow12Absorbent Paper Points

Machine rolled paper with a tapered end which offers good water absorbency, and assists you in the removal of surplus water from the knife boat, on the block face, and from the grids.

Available in two assortment sizes: (the bigger the number the larger the point.)

71011-01 Paper Points, Selection 1: Contains 200 assorted points sizes 15, 20, 25, 30, 35 and 40. 200/bx 19.00 Add to Cart
71011-02 Paper Points, Selection 2: contains 200 assorted points sizes 45, 50, 55, 60, 70, and 80. 200/bx 19.00 Add to Cart

Glass Knife Boatsarrow12Glass Knife Boats

These disposable plastic boats which easily attach to the triangular glass knife making a trough. To use: Simply slip the boat on the glass knife back and seal with either hot melted wax or nail polish.

71007 6.4 mm Glass Knife Boat 50/pk 11.00 Add to Cart
71008 6.4 mm Glass Knife Boat 100/pk 21.00 Add to Cart

Glass Knife Boat: Quick Boatarrow12Glass Knife Boat: Quick Boat

These boats are made from aluminum and are anodized black. They come complete with a set screw on one side. The area where the glass knife will be attached, is cut to fit to the width of the knife and is cushioned by silicone rubber to ensure a tight seal and no leakage.

71009-60 Quick Boat, for 6.0 mm Knife each 160.00 Add to Cart
71009-64 Quick Boat, for 6.4 mm Knife each 160.00 Add to Cart
71009-80 Quick Boat for 8.0 mm Knife each 160.00 Add to Cart
71009-10 Quick Boat for 10.0 mm Knife each 160.00 Add to Cart

Hair Curlarrow12Hair Curl

Made from human hair; good for removing sections, and cleaning the diamond knife.

71180 Hair Curl each 6.00 Add to Cart

Eyelash ManipulatorEyelash Manipulator Tiparrow12Eyelash Manipulator; A Traditional EM Tool

For direct manipulation of sections and small tissue samples this tool is perfect for any occasion. May be used during ultramicrotomy to carefully tease sections that are in the Diamond Knife boat. The Eyelash comes on a Sable Brush handle made from the highest quality wood.

These Eyelashes may be cleaned and sterilized with alcohol and a tissue.

71182 Eyelash Manipulator each 13.00 Add to Cart

Glass Knife Boxarrow12Glass Knife Box

Has a soft silicone base, anti-slip pads underneath, and a clear plastic, hinged dust cover for storing glass knives. Holds 10x 6.4 mm glass knives.

Measures: 6⅛" (L) x 2-9/32" (W) x 1½" (H) (115 mm x 58 mm x 37 mm).

71010 Glass Knife Box each 20.00 Add to Cart

For more ultramicrotomy tools, please see Ultramicrotomy Aid Tools.

Flat Emery Sticksarrow12Flat Emery Sticks

Emery paper which is glued to a wooden handle. 11" long x ¾" wide (279 x 19.1 mm). Very useful for filing excess resin of sample block tips. Grit size ranges from number 4/0 (finest) to 3 (coarsest).

Catalog No. Grit Pack Price  
62119-04 4/0 dozen 24.00 Add to Cart
62119-03 3/0 dozen 24.00 Add to Cart
62119-02 2/0 dozen 24.00 Add to Cart
62119-01 1/0 dozen 24.00 Add to Cart
62119-10 1 dozen 24.00 Add to Cart
62119-20 2 dozen 24.00 Add to Cart
62119-30 3 dozen 24.00 Add to Cart
62119-40 4 dozen 24.00 Add to Cart

Filing/ Polishing Stick and Stripsarrow12Filing/ Polishing Stick and Strips

A plastic handle, 10½" (267 mm) long, holds strips of emery paper or cloth 11" x 1" (279 x 25.4 mm). Strips are easily replaced. Comes complete with 2 strips/set (grit 120 and 240).

62118-02 Filing/ Polishing Stick and Strips set 26.50 Add to Cart
62118-12 Emery Refills in 12 Assorted Grids set 18.00 Add to Cart

arrow12Emery Paper

Please see listing in Tweezers, Micro-Tools, and Gadgets.

Silver Tapearrow12Silver Tape

Silver coated polyester tape, ⅜" width, 72 yards long, 3" core; good for making glass knife boats.

77700 Silver Tape each 40.00 Add to Cart
77701 Silver Tape ½" x 72 yds each 25.00 Add to Cart

arrow12Color Tapes

Please see the listing in the Photography Section

arrow12Duster Products; Dust-Off

Please see the complete listing of Environmentally Safe Dust-Off Products.

arrow12Ralph Glass Knife Maker

Please see the complete listing Ralph Glass Knife Maker

Laboratory Gloves arrow13arrow13