Globe Glass™ beakers are made with uniform wall thickness, flat bottoms, and low expansion borosilicate glass,  making them a strong and durable choice with excellent resistance to thermal shock.  The lab beakers have beaded rims and formed spouts to facilitate accurate and steady pouring of liquids.  Globe Glass low form Griffin style graduated beakers are available in sizes from 10mL to 4000mL.

Features

• High resistance to chemicals,
• Uniform wall thickness,
• Dual metric scale graduations,
• Durable white enamel printing,
• Large white marking area,
• Formed pour spout for easy pouring,

Specifications

• Meets ASTM E960 Type I Specifications,

• Chemical Composition – Low alkali borosilicate glass typically composed of 81% SiO2, 13% B2O3, and 4% Na2O.
• Optical Properties – Appears colorless and shows no noticeable absorption of light in the visible spectrum.
• Chemical Resistance
• Highly resistant to water, neutral and acid solutions, concentrated acids and their solutions, as well as bromine, chlorine, iodine, and organic matter, 
• Avoid use with hydrofluoric acid, very hot phosphoric acid, and alkaline solutions which will attack this glass.
• Thermal Properties:
• Coefficient of Linear Expansion: 32.5 x 10-7 cm/cm/°C
• Strain Point: 515°C
• Annealing Point: 565°C
• Softening Point: 820°C
• Specific Heat: 0.2
• Thermal Conductivity: 0.0027 Cal/cm3/°C/Sec.

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