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Table 11: White Translucent Colors

White
Translucent Color
Number

% Solar Transmittance for 4.5mm
Thick

% Visible*
Transmittance for

Approximate Shading Coefficients
for Horizontal Installation

Single-Glazed

Double-Glazed**

3.0
mm

4.5
mm

6.0
mm

3.0
mm

4.5
mm

6.0
mm

3.0
mm

4.5
mm

6.0
mm

Colorless
2906***
W2067
W2159***
W2254***
W2447
W7138
W7328
W7420
W7508

90

66
62
59
52
37
27
18
8

92

72
64
60
53
41
32
22
9

92

60
51
48
42
32
22
16
6

92

53
43
40
36
26
17
11
4

0.89
0.67
0.64
0.57
0.54
0.47
0.37
0.29
0.20
0.08

0.89
0.67
0.54
0.46
0.43
0.38
0.29
0.20
0.14
0.05

0.89
0.67
0.47
0.38
0.36
0.32
0.23
0.15
0.10
0.04

0.89
0.62
0.59
0.52
0.50
0.43
0.34
0.27
0.18
0.07

0.89
0.62
0.50
0.42
0.40
0.35
0.27
0.18
0.13
0.05

0.89
0.62
0.43
0.35
0.33
0.29
0.21
0.14
0.09
0.04
*Visible light transmittance is measured using C.I.E. Source C. Visible and solar transmittance are measured on a flat sheet.
**Double glazing is clear outside over white inside. Shading coefficients are based on dome skylights
***Custom colors; others are standard.

Note: For the same visible transmittance (VT), the white translucent Plexiglas® sheet has a lower shading coefficient (SC), so it allows less solar heat gain. For example, 2094 Gray has a VT of 55% with an SC of 0.71, while 0.118" W2447 has a VT of 53% and an SC of 0.47. This is because the gray absorbs transmitted sunlight, while the white mostly reflects it.