Procedure: ASTM G utilizes a nutrient salts agar that provides all of the trace nutritional elements needed by fungi to support growth. However, to achieve a. Buy ASTM G PRACTICE FOR DETERMINING RESISTANCE OF SYNTHETIC POLYMERIC MATERIALS TO FUNGI from SAI Global. ASTM G Standard Practice for Determining Resistance of Synthetic Polymeric Materials to Fungi. This practice covers determination of the effect of.

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This ensures that you are always up-to-date and saves you both time and money. Many products that operate in warm, humid environments must be tested to withstand fungal attacks, since this problem can cause myriad of operational challenges.

Changes in optical, mechanical, and electrical properties may be determined by the applicable ASTM methods.

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. Start Webshop Product catalog Product presentation. As the voice of the U. G2109 standard is not included in any packages.

The fungus results are usually determined and recorded as a growth rating:. Breaching protective covers to mar the appearance and degrade the optical capabilities of your product Shedding metabolic waste products that cause corrosion or etching Prompting electrical systems to develop undesirable conducting paths Blocking delicate moving parts Introducing internal moisture, which can affect system performance Fungus Testing Test methods are used to determine the effect of fungi on the properties of synthetic polymeric materials in the form of molded and fabricated articles, tubes, rods, sheets, and film materials.

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.

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Historical Version s – view previous versions of standard. The moment new editions of the standards you monitor are released, changes are made, or appendixes are published, you will be alerted by email. The Fungus Resistance test is used to determine the resistance of key materials to fungi, and to determine if these materials are adversely affected by ast under conditions favorable for their development… namely, high humidity, warm atmosphere, and presence the of inorganic salts.

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If the document is revised or amended, you will be notified by email. Spores are grown for approximately 2 — 3 weeks, followed by inoculation of the spore suspension the combined spores that are selected for testing and placed in a test chamber for aztm days or as specified.

Standards Subscriptions from ANSI provides a money-saving, multi-user solution for accessing standards. If the sample appears to be absent of growth magnifications upwards of 50x, it should be used to verify that no growth exists.

ASTM G21:09

You can download and open this file to your own computer but DRM prevents opening this file on another computer, including a networked server. The asrm can reveal if the specimen being analyzed supplies sufficient nutrition for fungal growth.

Link to Active This link will always route to the current Active version of the standard.

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It can also show, for long test durations, the effects fungus may have on the test specimen, such as changes in appearance, or in mechanical and electrical properties. There could be fungal spores on the samples that are not readily visible to the eye due to the size of the spores, localized areas of growth, or because the color of the spores are similar to those of the test astmm.

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Already Subscribed astj this document. If the samples are mishandled or suspected of contamination prior to testing, they should be cleaned, Testing cannot be conducted on specimens until 72 hours have passed. Determination of these effects is not covered in this practice. The fungus results are usually determined and recorded as a growth rating: Please first log in with a verified email before subscribing to alerts.

ASTM G21 – National Technical Systems

Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. If handling is necessary gloves, should be worn while handling test specimens. Contamination can have a negative effect on the test results since it could easily provide nutrients to the fungus for growth. Test methods are used to determine the effect of fungi on the properties of synthetic polymeric materials in the form of molded and fabricated articles, tubes, rods, sheets, and film materials.

Your Alert Profile lists g21-0 documents that will be monitored. To assess materials other than plastics, use of this test method should be agreed upon by all parties involved.