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ASTM D tests for fluorescent UV exposure of plastics. It covers specific procedures and test conditions based on practices ASTM G and ASTM G This standard is issued under the fixed designation D ; the number 1 This practice is under the jurisdiction of ASTM Committee D on Plastics. ASTM D – Designation: D – 05 Standard Practice for Fluorescent UV Exposure of Pla.

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Ketola and Douglas Grossman, eds. Often several exposure times such as, and hours also will be compared to each other. However, performance comparisons under the controlled conditions d439 accelerated weathering can be compared to documented performance of materials and coatings that have experienced extended periods of end use exposure.

Historical Version s – view previous versions of standard.

ASTM D4329

Refer to Practice G for detailed information on the caveats applicable to use of results obtained in accordance with this practice. When a single exposure period is used, select a time or radiant exposure that will produce the largest performance differences between the test materials or between the test material and the control material. Need help or have a question? Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

For instance, if two specimens are stacked vertically in each holder, then the top and bottom specimens should switch places halfway through the test.

Conduct these round robins in accordance with Practice E or Practice D and include a statistically representative sample of all laboratories or organizations who would normally conduct the exposure and property measurement. No direct correlation can be made between accelerated weathering duration and actual outdoor exposure duration. Parts may be accommodated depending on size. Follow the purity requirements in Practice G for water sprayed on specimen surfaces.

Last previous edition approved in as D – Standards can be obtained from appropriate standard authorities. All concerned parties must agree on the control material used. Global Reach Intertek is the industry leader with over 42, people in 1, locations in over countries. Through our network of over 43, people in 1, laboratories aetm offices in countries, Intertek provides quality and safety solutions to a wide range of industries around the aastm.

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Accelerated weathering simulates damaging effects of long v4329 outdoor exposure of materials and coatings. NOTE 6—An example of a statistical analysis using multiple-laboratory and exterior exposures to calculate an acceleration factor is described by Simms. It is recommended that deionized water be used for water used to produce condensation.

D — 05 Standard Practice for Fluorescent UV Exposure of Plastics1 This standard is issued under the xed designation D ; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. Attach porous specimens to a solid backing such as aluminum that can act as a vapor barrier. Validating the specifications, value and safety of your raw materials, products and assets. This method is preferred over evaluating materials after an arbitrary exposure time or radiant exposure.

D43299 2—Additional information on sources of variability and on strategies for addressing variability in the design, execution, and data analysis of laboratory-accelerated exposure tests is found in Guide G Therefore, no reference to the use of this practice should be made unless accompanied by a report prepared aastm accordance with Section 8 that describes the specific operating conditions used.

Accelerated Weathering (QUV) ASTM G154, ASTM D4329, ASTM D4587, ISO 4892

Moisture is provided by forced condensation, and temperature is controlled by heaters. NOTE 7—For some materials, changes may continue after the specimen has been removed from the exposure apparatus.

Inspection Validating the specifications, value and safety of v4329 raw materials, products and assets.

It is recommended that at least three replicates of each material be exposed to allow for statistical evaluation of results. Do not place the apparatus near a heat source such as an oven.

It is recommended that at least three replicates of each material be exposed to allow for statistical evaluation of results. Individual reprints d432 or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. Send us a request Need help or have a question?

These cycles would be continued for extended periods of time – up to thousands of hours – simulating even longer periods of time s4329 the real world.

Misleading results may be obtained by this method, since the masked portion of the specimen is still exposed to temperature and humidity cycles that in many cases will affect results.

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This practice is intended to induce property changes associated with end-use conditions, including the effects of sunlight, moisture, and heat.

It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. If you feel that your comments have not received a fair hearing you should make your views known to the D44329 Committee on Standards, at the address shown below. Signicance and Use 4. ASTM International takes no position respecting the validity of any patent rights asserted in asmt with any item mentioned in this standard.

Originally approved in Control of ambient temperature is particularly critical when one apparatus is stacked above another, because the heat generated from the lower unit can interfere with the operation of the units above.

Hemispherical on 37 Degree Tilted Surface 2. When specimens are removed from the exposure apparatus for 24 h or more and then returned for additional exposure, report the elapsed time as noted in accordance with C4329 9.

Assurance Enabling you to identify and mitigate the intrinsic risk in your operations, supply chains and business processes. Suggested aluminum alloys are, or This practice is intended to induce property changes associated with end-use conditions, including the effects of ultraviolet solar irradiance, moisture, and heat. The values given in brackets are for information only.

This practice also covers the preparation of test specimens, the test conditions best suited for plastics, and the evaluation of test results. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.

Accelerated Weathering (QUV) ASTM G, ASTM D, ASTM D, ISO

For measurements 8 Fischer, R. Operate the device continuously. Formally confirming that your products and services meet all trusted external and internal standards.

Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility. A number in parentheses x4329 the year of last reapproval.