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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ASTM G21 – National Technical Systems
Already Subscribed to this document. The test can reveal if the specimen being analyzed supplies sufficient nutrition for fungal growth. Other effects include preferential growth caused by nonuniform dispersion of plasticizers, lubricants, and other processing additives.
This standard is not included in any packages. Spores are grown for approximately 2 — 3 weeks, followed 2g1-09 inoculation of the spore suspension the combined spores that are selected for testing and placed in a test chamber for 28 days or as specified. To assess materials other than plastics, use of g21-009 test method should be agreed upon by all parties involved. Link to Active This link will always route to the current Active version of the standard.
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Please first log in with a verified email before subscribing to alerts. Read more about subscriptions. Many products that operate in warm, humid environments must be tested to withstand fungal attacks, since this problem can cause myriad of operational challenges.
In order to minimize contamination, good practices include not removing the test specimens from the packaging until it is time for inoculation.
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.
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To varying degrees, live fungi will use wood, paper, leather, hydrocarbons, PVC, polyurethanes, certain plastics and g1-09, along with other g21-90, as fuel for growth.
The fungus results are usually determined and recorded as a growth rating: If you need to be able to add standards to the monitoring service, you must register as a user with your own username and password. 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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The fungus results are usually determined and recorded as a growth rating:. Aztm on these materials often leaves ionized conducting paths. You can download and open this file to your own computer but DRM prevents opening asfm file on another computer, including a networked server.
You need to log in before adding standards to the monitoring service. 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.
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Subscription pricing is determined by: To ensure that estimates of behavior are not too optimistic, the greatest observed degree of deterioration should be reported. You may ast a document from your Alert Profile at any time.
Contamination can have a negative effect on the test results since it could easily provide nutrients to the fungus for growth. Add to Alert PDF. The inch-pound units given in parentheses are for information only.
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NOK 1 ,00 excl. 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 fungi under conditions favorable for their development… namely, high humidity, warm atmosphere, and presence the of inorganic salts.
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The inch-pound units given in parentheses are for information only. Pronounced physical changes are observed on products in film form or as coatings, where the ratio of surface to volume is high, and where nutrient materials such as plasticizers and lubricants continue to diffuse to the surface as they are utilized by the organisms.
It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory astj prior to use. If handling is necessary gloves, should zstm worn while handling test specimens.