Specifications include, but are not limited to: Glass traffic beads for use with waterborne traffic paint; 3.1 Quality Assurance Control: The beads shall be segregated into maximum lots of 20,000 Kg (44,000 lb). The manufacturer shall test each lot for compliance to the specification requirements listed in Table II, entitled ‘Test Methods”. Lot analysis shall be retained for at least two (2) years.; 3.2 Appearance: When tested as specified in Paragraph 4.3, the glass spheres shall be colorless; clean; transparent; free from milkiness or excessive air bubbles; and essentially clean from surface scarring or scratching.; 3.3 Roundness: When tested as specified in Paragraph 4.4, the traffic beads shall have a minimum of eighty percent (80%) rounds overall.; 3.4 Embedment Coating: When tested as specified in Paragraph 4.5, the traffic beads shall be embedment coated with a material, which enhances adherence of these beads in the waterborne traffic paint.; 3.5 Specific Gravity: When tested as specified in Paragraph 4.6, the traffic beads shall have a specific gravity of two and forty-four one-hundredths (2.44) to two and fifty-six one hundredths (2.56) at twenty-five degrees Centigrade (25°C) (seventy-seven degrees Fahrenheit (77°F)).; 3.6 Visual Requirements: 3.6.1 Referee Method: When tested as specified in Paragraph 4.3, the glass beads shall have a minimum of eighty percent (80%) rounds and shall satisfy the specification requirements described in Paragraph 3.2 - Appearance.; 3.6.2 Alternate Method: When tested as specified in Paragraph 4.4, the traffic beads shall comply with the specification requirements described in Paragraph 3.3 Roundness.; 3.7 Moisture Content: When tested as specified in Paragraph 4.7 the moisture content shall not exceed one one-hundredth percent (0.01%).; 3.8 Moisture Resistance: When tested as specified in Paragraph 4.8, the traffic beads shall flow freely with minimal resistance.; 3.9 Refractive Index: When tested as specified in Paragraph 4.9, the Index of Refraction shall be a minimum of one and five-tenths (1.5).; 3.10 Reduction in Luster or `Reflective Power: When tested as specified in Paragraph 4.10, the reduction in luster or reflective power of the beads shall be minimal.
