LX-57B Lead Glass

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LX-57B : Radiation Shielding Lead Glass

MarShield’s LX-57B x-ray shielding lead glass is made of high quality optical grade material. It provides excellent radiation shielding, superb visual clarity, high light transmission and does not discolour due to radiation. The hard, polished surfaces have excellent scratch resistance. LX-57B is available in thicknesses of 9mm, 14mm, and 17mm.

Features and Benefits:

  • Stock sizes are available up to 48″ X 96″. Available upon special request is 48″ X 102″.
  • Resistant to discolouration due to exposure to ultraviolet rays or cleaning chemicals. The durable LX-57B glass retains its appealing visual clarity.
  • Offers excellent light transmission (87.3% with 7mm thick glass).
  • LX-57B is non-combustible and will not emit toxic fumes when being cut.
  • Both surfaces of LX-57B are polished. Using Mohn’s hardness scale, LX-57B tests at level 6 (comparable to feldspar, a constituent of granite). LX-57B has excellent scratch resistance because of its hard surface.
  • LX-57B is a lead barium type glass of high quality optical grade with over 60 percent heavy metal oxide, including at least 55 percent PbO.

Made of high quality optical grade material, LX-57B offers excellent radiation protection and high light transmittance. Hard, polished surfaces offer greater scratch resistance and superior visual clarity. Unlike other radiation shielding products, LX-57B will not discolor due to radiation exposure. With LX-57B, the choice is CLEAR.

Largest Inventory in North America
Stock sizes from 8" x 10"  up to 48” x 96”

Industry’s Fastest Lead Times
1-3 Business days (same day service available)

Properties

  • Minimum density: 4.36 (g/cm³)
  • Refractive index (Nd): 1.71
  • Thermal expansion coefficient: 80 X 10-7 /°C (30- 380°)
  • Knoop hardness: 370>

Thickness and Lead Equivalent

Thickness 9mm 14mm 17mm
Lead Equivalent (in) *5/64 *7/64 *1/8
Lead Equivalent (mmPb) 2.0 3.0 3.3
X-Ray Tube Peak (kV) 150 200 200
Weight (lbs./sqft) 8.1 12.5 14.8
Safety Laminated No No Yes (7mm+9mm)

*Lead equivalent is guaranteed in (mmPb). The converted fraction (in.) is less than the lead equivalent (mm Pb); fraction is approximate.

Stock Sizes

10″ X 8″ 10″ 12″
12″ X 12″ 16″ 18″ 20″ 24″
14″ X 18″
16″ X 20″ 24″
18″ X 24″ 26″
20″ X 24″
24″ X 24″ 30″ 36″
30″ X 30″ 36″
32″ X 40″
36″ X 36″ 48″ 60″ 72″ 84″ 96″
42″ X 48″ 60″ 72″ 84″ 96″
48″ X 48″ 60″ 72″ 84″ 96″

Note
24-HOUR TURNAROUND TIME IS AVAILABLE ON MOST SIZES
*Lead Equivalent is guaranteed in (mmPb). The converted fraction (in.) is less than the lead equivalent (mmPb); fraction is over-coverage

To calculate the values of the range of “Lead Equivalent (ibs/sq.ft.)”, we converted from the values of the range of “Lead Equivalent (mmPb)” using the mentioned figues and rounded off the fractions to one decimal place: 1 foot=30.48cm / 1 pound=453.59g / Density of lead=11.3(g/cm3).

Uses and Applications

Medical

Used in the medical field for X-ray observation equipment, electron beam/plasma generators and X-ray TV detectors. LX lead glass protects doctors and staff from X-ray irradiation with no glass discoloration or deterioration in viewing quality. Use of the larger size LX windows facilitates remote control of X-ray equipment.

Industrial

LX is used in airport luggage inspection equipment as well as in radiation testing equipment for industrial products.

Nuclear

LX observation windows are used at radioactive storage stations, nuclear fuel development and reprocessing plants, and for applications near nuclear reactors.

LX-57B Lead Glass vs. Acrylic/Plastic

Relative Thickness

For the same lead equivalent, acrylic/plastic has to be approximately five times thicker than LX-57B lead glass – significantly reducing observation capabilities. For example, at 1.8mm-2.0 mm Pb, lead glass would be 5/16” thick. Acrylic/plastic would be approximately 1-1/2” thick for the same protection. The extra thickness of acrylic/plastic may require special framing. LX-57B fits standard sized frames.

Resistance to Discoloration

Acrylic/plastic discolors when exposed to ultraviolet rays. Acrylic/plastic is also susceptible to discoloration from chemicals in everyday use, such as cleaning materials…or even smoke. LX-57B glass suffers no discoloration due to radiation and has a high chemical resistance as well. The durable LX-57B glass retains its appealing visual clarity.

Weight Factor

For the same size requirement and lead equivalent, acrylic/plastic has nearly twice the weight of glass (1.8 times).

Light Transmittance

For the same lead equivalent, glass transmits more light than acrylic/plastic.

Combustibility

LX-57B is an incombustible material because it’s glass. Acrylic/plastic is combustible. When acrylic/plastic burns, it emits toxic fumes. When acrylic/plastic is cut, it may emit toxic fumes. This does not happen with LX-57B lead glass.

Surface Hardness

Both surfaces of LX-57B glass are polished. Using Mohs’ hardness scale, LX-57B tests at level 6 (compatible to feldspar, a constituent of granite). Acrylic/plastic test at level 3 (equivalent to calcite, a constituent of limestone and chalk).

Abrasive Resistance

LX-57B has greater resistance to scratches because of it’s hard surface. Unlike glass, acrylic/plastic can be easily be scratched in cleaning because of it’s softer surface, reducing its light transmittance and clarity.

Specifications

Acceptance Manufacturers All radiation shielding glass shall be LX-57B as supplied
by Amerope.

Materials

LX-57B shall be of lead barium type glass of high quality optical grade with over 60 percent heavy metal oxide, including at least 55 percent PbO.

Comparison Table LX-57B Lead Glass Lead Acrylic
Light Transmission 87.3% 59.5%
Combustible No Yes
Thickness 9mm 45mm (5x thicker)
Weight 8lbs/sqft 15lbs/sqft
Discolors No Yes