1、Designation:D558897(Reapproved 2021)Standard Test Method forDetermination of the Microbial Condition of Paint,Paint RawMaterials,and Plant Areas1This standard is issued under the fixed designation D5588;the number immediately following the designation indicates the year oforiginal adoption or,in the
2、 case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method covers a procedure for the determina-tion of the microbial condition(contami
3、nation or sterility)ofraw materials used in the manufacture of paint,and themicrobial condition of paint and paint manufacturing areas.1.2 The values in SI units are to be regarded as the standard.The values given in parentheses are for information only.1.3 This standard does not purport to address
4、all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in a
5、ccor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Summary of Test Method2.1 Th
6、is test method outlines procedures to(1)obtainsamples for sterility testing from wet or dry materials and plantsites,(2)conduct the sterility testing on those samples to see iftheyarecontaminated,(3)evaluatethedegreeofcontamination,if any,and(4)provide a guide for someindication of the type of conta
7、mination present(bacterial,fungal,yeast,etc.).This test method is not designed to includeall the necessary precautions to maintain the level of sterilityrequired to provide the most accurate results.Some familiaritywith microbiological techniques is recommended.3.Significance and Use3.1 Spoilage of
8、paint in the container is often related to theuse of contaminated raw materials,water(particularly recycledwashwater),vessels,piping,and equipment in the manufactur-ing plant.There is a need for a simple method to determine thepresence or absence of microorganisms in plants that manu-facture paints
9、and coatings.Such a determination enables themanufacturer to establish the point of contamination(that is,raw materials or problem housekeeping areas in the plant)tohelp in solving the spoilage problem.NOTE1Some contamination in plant areas is to be expected,sincemicroorganisms are ubiquitous and ca
10、nnot generally be eliminated prac-tically(it is what an in-can preservative is supposed to control).Excessivelevels of contamination or contaminated raw materials can exceed thecapability of the preservative.If you have excessive contamination in theplant,there are methods for decontamination includ
11、ing steam,preservatives,bleach,etc.These should be discussed with your biocidesupplier and used with care.Recovery of spoiled or contaminated productsis often not feasible,so an adequate level of the appropriate biocide inconjunction with good plant housekeeping practices are essential.Yourbiocide s
12、upplier can also help here.3.2 This test method may be used by persons without basicmicrobiological training,but some training on aseptic tech-niques would be recommended.NOTE2The reliability of the results obtained from this test method isextremely dependent on the techniques employed.Improper tech
13、niquescan result in a sterile sample appearing to be contaminated,and evenworse,a contaminated sample appearing to be sterile(see also 5.1).It isrecommended that you consult with your biocide supplier,raw materialsupplier,or an independent testing laboratory to confirm questionableresults.4.Apparatu
14、s and Materials4.1 Balance,capable of weighing to 0.10 g.4.2 Incubator,or other device capable of maintaining aconstant temperature between 28 and 32C.4.3 Refrigerator.4.4 Tryptic Soy Agar(TSA)Plates,2pre-prepared.3(SeeNote 3).1This test method is under the jurisdiction of ASTM Committee D01 on Pain
15、tand Related Coatings,Materials,and Applications and is the direct responsibility ofSubcommittee D01.28 on Biodeterioration.Current edition approved Nov.1,2021.Published November 2021.Originallyapproved in 1994.Last previous edition approved in 2017 as D5588 97(2017).DOI:10.1520/D5588-97R21.2Please
16、note that Tryptic Soy and Trypticase Soy are names used interchange-ably.Pre-prepared TSA plates,BBL#21185,are available from various microbio-logical supply companies.3Agar plates(media)may be purchased pre-prepared using the indicated Difcoor BBL number from microbiological supply companies,or both.Media may alsobe prepared from the formulations given in the Difco Manual(Difco Laboratories,Detroit,MI)or from appropriate dehydrated media using standard microbiologicaltechniques.Copyright ASTM I
