Cover Glass Rectangles

Quality and economy

• Cut from colorless micro sheet which is of the highest resistance to attack by moisture; free from lead oxide; remarkably free from brittleness and very flat
• Precision controlled thickness is obtained
• Conforms to Interim Federal Specification NNN-C-001434A
• Relative absence of brittleness greatly reduces breakage in handling and cleaning, particularly of large rectangles
• Practically noncorrodible, corrosion under conditions other than tropical is highly improbable
• Thickness of Red Label Cover Glasses is controlled within the following tolerances:
• No. 0 – 0.085 to 0.13 mm thick, No. 1 – 0.13 to 0.17 mm thick, No. 11/2- 0.16 to 0.19 mm thick, No. 2 – 0.17 to 0.25 mm thick

Sizes in widest use are packed in a hinged-lid plastic box with die-cut foam plastic support liner. Cover glasses can be withdrawn singly without touching the surface. Remaining sizes are packed in small cardboard boxes. Ten 1 oz. boxes are packed in a convenient carton.

NOTE: thickness correction of microscope objectives is usually etched or printed on the objective.

Thickness of Red Label Cover Glasses is controlled within the following tolerances:

No. 1 – 0.13 to 0.16 mm thick
No. 1 1/2 – 0.16 to 0.19 mm thick
No. 2 – 0.19 to 0.23 mm thick