TT-B-1325D Type1A 1B Type 3 Type 4A 4B Airport marking Glass Beads Application

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Update time : 2024-08-27

Airport Marking Glass Beads

Airport pavement markings on runways, taxiways and ramps play an important role in preventing often serious accidents and incursions by guiding airport traffic safely between the air, runways, and parking gates.

TTB-1325C Type I (Gradation A)
1.5 Index Glass Beads for drop-on applications. The sizing and quality is similar to typical traffic safety and highway markings.

TTB-1325C Type III
1.9 Index Glass Beads for drop-on applications produces a narrow cone of light due to higher refractive index. Because of their relatively high costs, typically limited to marking airport runways only.

Type IV (Gradation A & B)
Premium quality, large 1.5 Index Glass Beads for drop-on application. The larger gradation size, higher percentage roundness (+85%), smooth surface and hardness qualities enhance the long-term reflective performance of airport markings even under wet / night conditions.

Gradation, percent by weight, passing

		Type I				Type III		Type IV
U.S. Sieve #	Microns	A		B				A		B
U.S. Sieve #	Microns	Min	Max	Min	Max	Min	Max	Min	Max	Min	Max
12	1700	---	---	---	---	---	---	100	---	100	---
14	1400	---	---	---	---	---	---	95	100	---	---
16	1180	---	---	---	---	100	---	80	95	95	100
18	1000	---	---	---	---	---	---	10	40	---	---
20	850	100	---	---	---	95	100	0	5	35	70
30	600	80	100	---	---	55	75	---	---	0	5
40	425	---	---	---	---	15	35	---	---	---	---
50	300	18	35	---	---	0	5	---	---	---	---
70	212	---