What is ASTM G154?
ASTM G154 is a standard that is used as the basis for all other accelerated weathering standards that use fluorescent UV light sources to simulate exposure to natural sunlight. Many standards call up this practice.
What is ASTM G155?
ASTM G155 is a practice for operating xenon arc light apparatus for exposure of non-metallic materials. Testing ASTM G155 allows the reproduction of the weathering effects occurring when materials are exposed to sunlight (either direct or through window glass) and moisture.
How is UV resistance measured?
The change in color can be measured by a spectrophotometer. The upholstery industry standard for UV resistance test is at least 40 hours with no color change.
What is ASTM D7869?
ASTM D7869 – 13 Standard Practice for Xenon Arc Exposure Test with Enhanced Light and Water Exposure for Transportation Coatings.
What is Quv test?
QUV testing is used to simulate outdoor and indoor sun exposure on surface finishes and coatings and polymers. ASTM G154 is a practice used to do QUV testing.
What is ASTM D2244?
ASTM D2244 is a standard test method for calculating color differences from instrumentally measured color coordinates. Indeed the sample texture, may affect the correlation between the magnitude of a measured color difference and its commercial acceptability.
What is UV resistance?
UV resistance refers to a material’s ability to avoid degradation caused by the absorption of UV radiation. The sun’s UV rays break down chemical bonds in polymers, causing plastics to wear down and disintegrate over time. This is known as photodegradation.
Who are resistant to UV light?
Good resistance to ultraviolet rays can be achieved from polymers extruded by Zeus such as PTFE, PVDF, FEP, and PEEKTM. The only plastics found with excellent resistance are the imides, Polyimide (PI) as used in the Hubble Space Telescope and Polyetherimide (PEI).
What is Quv accelerated weathering test?
The QUV accelerated weathering tester reproduces the damage caused by sunlight, rain and dew. In a few days or weeks, the QUV UV tester can reproduce the damage that occurs over months or years outdoors. It simulates dew and rain with condensing humidity and/or water spray. …
What does Quv stand for?
|QUV||Quad Utility Vehicle|
|QUV||Qui Umbrae Venimus (gaming guild)|
|QUV||Relative Magnetic Bearing (radiotelegraphy)|
How UV resistant is HDPE?
Normally HDPE has a poor resistance to UV, a segment of sun light. The whitish, translucent appearance is the natural color of HDPE. If milk jugs are left outside for a few months, even worse in direct sun light, they will degrade to such an extend that you can crumble them easily with your hands.
What is significance of UV stabilizers?
UV stabilizers protect the polymer from the degradative attack of UV energy, or exposure to fluorescent light and filtered daylight.
How does a g154 test work?
In a G154 test, technicians use fluorescent bulbs to simulate weather conditions as well as various levels of heat and moisture. The chamber’s fluorescent bulbs can simulate both UVA and UVB light spectrums.
What is ASTM g154 used for?
ASTM G154 ASTM G154 is a standard that is used as the basis for all other accelerated weathering standards that use fluorescent UV light sources to simulate exposure to natural sunlight. Many standards call up this practice. For a list of these by product category, please see the QUV standards list.
How many additional work offsets does the g154 support?
This feature provides 99 additional work offsets. G154 with a P value from 1 to 99 activates additional work offsets. For example G154 P10 selects work offset 10 from the list of additional work offsets.
What is included in practice ATSM g151/g154?
Specimen preparation and evaluation of the results are covered in practice ATSM G151 and ISO 4892-1. More specific information about methods for determining the change in properties after exposure and reporting these results is described in ISO 4582. Infographic showing typical test parameters for ASTM G154. (See the right hand photo)