File:PlasticsResearch 002.jpg
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Summary[edit]
DescriptionPlasticsResearch 002.jpg |
One of the tests made on plastics at the National Bureau of Standards is the determination of resistance to weathering. The transparent plastic specimens shown are being submitted to a 240-hour accelerated weathering test approximately equal to one year of outdoor exposure in Washington, DC. During this test, specimens are alternately exposed to radiation from a sunlamp (200 hours) and to water in the form of a mist (20 two-hour periods). The effects of weathering on transparent materials are determined by measuring the changes in light transmission and the increase in haze. In many cases materials with known resistance to weathering are tested at the same time as new materials for control purposes. This method of test is used to evaluate plastic materials for actual use, new plastics, experimental materials, and the effects of compounding ingredients. |
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Source | National Institute of Standards and Technology | ||||
Author | National Institute of Standards and Technology | ||||
Permission (Reusing this file) |
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Licensing[edit]
Public domainPublic domainfalsefalse |
This image is in the public domain in the United States because it is a work of the United States Federal Government, specifically an employee of the National Institute of Standards and Technology, under the terms of Title 17, Chapter 1, Section 105 of the US Code.
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current | 19:28, 6 March 2014 | 4,641 × 5,771 (1.49 MB) | NISTResearchLibrary (talk | contribs) |
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Metadata
This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
Image title |
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Author | National Institute of Standards and Technology |
Copyright holder |
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Source | Plastics Research Photographic Collection |
Headline | National Institute of Standards and Technology |
Short title |
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Width | 4,641 px |
Height | 5,771 px |
Bits per component |
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Compression scheme | Uncompressed |
Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 600 dpi |
Vertical resolution | 600 dpi |
Data arrangement | chunky format |
Software used | Adobe Photoshop CS5 Windows |
File change date and time | 14:15, 21 February 2013 |
Exif version | 2.21 |
Color space | Uncalibrated |
Original transmission location code | 17629-8 |
Date metadata was last modified | 09:15, 21 February 2013 |
Date and time of digitizing | 02:40, 29 January 2013 |
Unique ID of original document | xmp.did:3FDD22A2597CE211A95DF13A5B7DF01E |
Keywords | Plastics--Research--Photograph collections. |
Contact information | library@nist.gov
100 Bureau Dr, MS 2500 Gaithersburg, MD, 20899 |
IIM version | 2 |