AASHTO M247 TYPE 4 and 5

The Glass Beads are highly reflective 1.5 index glass beads that are 90%+ round. They are made using a unique and revolutionary manufacturing process along with the purest of raw materials.The size of a glass bead can affect retroreflectivity, especially under wet conditions. Larger beads have slightly higher retroreflectivity than standard beads under dry conditions.Retroreflective Index is more than >500 mcd.M-2.1x-1

Specification

Refractive Index

Roundness Rate

Size Range&Cumulative retained

AASHTO M247 TYPE 4

>1.5

>90%

>2.0

1.7-2.0

1.4-1.7

1.18-1.4

1.0-1.18

< 1.0

0%

0-5%

0-20%

40-85%

5-40%

0-5%

AASHTO M247 TYPE 5

>1.5

>90%

>2.35

2.0-2.35

1.7-2.0

1.4-1.7

1.18-1.4

< 1.18

0%

0-5%

0-10%

40-85%

5-40%

0-5%

AS/NZS 2009:2007 D

>1.5

>90%

>1.7

1.4-1.7

1.18-1.4

1.0-1.18

0.85-1.0

< 0.85

0%

0-5%

0-20%

40-85%

5-40%

0-5%