1.1. This test method describes an environmental chamber and the conditions of operation to evaluate in a 4-week period the relative resistance to mold growth on coated building products designed for interior application using an indirect inoculation method. The apparatus is designed so it can be easily built or obtained by any interested party. 1.2.This test method can be used to evaluate the comparative resistance of coated building products to accelerated mold growth. Ratings do not imply a specific time period that the coated building product will be free of fungal growth during installation in an interior environment. 1.3.This test method is not intended for use in the evaluation of public health claims. 1.4.The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.5.This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and to determine the applicability of regulatory limitations prior to use. 1.6 The test method is intended for the accelerated evaluation of mold growth on a coated building product designed for interior use. This method is not intended for evaluation of surfaces designed for exterior applications or uncoated surfaces. Use of this test method for evaluating exterior performance has not been validated, nor have the limitations for such use been determined. Any use of accelerated weathering (leaching, weathering machine exposure, etc.) should be reported and should also bear reference to the fact that it is beyond the current scope of this test method.
No standard currently exists within ASTM committee D01.28 to evaluate the fungal resistance of coated building products designed for interior use. In the absence of a more suitable method the building products companies have adapted ASTM D3273 for use in developing fungal resistant products such as ceiling tile and gypsum wallboard. Work item 8681, which called for a direct inoculation of the sample is being closed because round robin data showed no improvement over D3273. This new work item will rely on an indirect inoculation.
KeywordsEnvironmental Chamber:Fungal Growth:Coated building product:Fungal Resistance::
The title and scope are in draft form and are under development within this ASTM Committee.Back to Top
Ballot Item Approved
Ballot Item Approved as D7855-2013 and Pending Publication