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The technical information contained here is typical of test results of a particular design. Your application, including the entire assembly, may need to be evaluated and specifically designed
to your requirements. Silver Cloud reserves the right to revise specifications without prior notice.
Transmission Curves and L*, a*, b* Coordinates for Standard DURALAN II Materials, with CLP-260 Surface Finish and Standard .060&Mac253; (1.52 mm) Thickness
The transmission curves are obtained using a Perkin-Elmer Lambda 3, UV/VIS Spectrophotometer in accordance with CIE 1976 USC Chromaticity Diagram.
Transmission curves on L*, a*, b* values are nominal and are to be used as design guidelines only.
 L = Lightness Scale
a = Hue – Red and Green Scale
b = Saturation – Blue and Yellow Scale
1000 Clear
L*=88.3
a*=-1.3
b*=-1.1
Temperature: 160°F (72°C)
Humidity: 80% RH
Chemical Soak Watch Glass Rating
• 3 Major chemical attack such as wrinkle, blister, and destroy between five minutes and one hour
• 2 Minor cosmetic defects such as craze, haze, and gloss change between one and 24 hours
• 1 24-hour exposure OK
• 24-Hour Watch Glass Soak Test is one of the industry's most stringent tests for chemical resistance.
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Chemical Resistance: 24-Hour Watch Glass Soak*
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Chemical
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CLP-290
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CLP-260
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CLP-240
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CLP-210
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Acetic Acid
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1
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1
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1
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1
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Acetone
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1
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2
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2
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2
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Dimethyl Formamide
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1
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2
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2
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2
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Ethyl Acetate
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1
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1
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2
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2
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10% Hydrochloric Acid
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1
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1
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1
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1
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Isopropyl Alcohol
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1
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1
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1
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1
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MEK
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1
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2
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2
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2
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Pine Oil
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1
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1
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1
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1
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Ammonia
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1
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1
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1
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1
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Toluol
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1
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1
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2
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2
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Water
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1
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1
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1
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1
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Windex
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1
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1
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1
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1
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Unleaded Gas
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1
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1
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1
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1
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Oil 30w
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1
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1
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1
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1
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Brine 33% Salt
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1
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1
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1
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1
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THF
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1
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2
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2
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2
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MeCl
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2
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2
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3
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3
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10% NaOH
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2
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2
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2
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2
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Optical Properties
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Surface
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Gloss(1)
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Lt. Trans.(2)
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Haze(2)
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| CLP 290 High Gloss |
87-93
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90-93%
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0.3-0.7%
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| CLP 260 High Gloss |
57-63
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88-93%
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9-14%
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| CLP 240 Med. Gloss |
37-43
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80-85%
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20-25%
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| CLP 210 Low Gloss |
7-13
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63-65%
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45-50%
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(1) Based on black background
(2) These readings are based on .060&Mac253; (1.52 mm) clear window/lens; Testing per ASTM D1003-61
Taber Abrasion: ASTM D1044-85 (% haze change based on .060&Mac253; clear core material)
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Cycles
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CLP-290
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CLP-260
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CLP-240
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CLP-210
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25
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1.60%
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.60%
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2.90%
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1.60%
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50
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2.50%
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3.2%
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4.20%
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7.30%
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100
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5.80%
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8.70%
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12.40%
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15.80%
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200
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13.00%
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18.00%
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20.90%
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24.00%
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