1.1 真菌生长在油漆行业中经常被称为霉菌，会导致暴露在室外的漆膜受损。为了比较不同涂层的性能，需要对因真菌或藻类攻击导致的油漆表面缺陷进行视觉评级。 1.2 这种评估霉菌的方法旨在用于外部暴露的漆膜。该方法可用于评估内部真菌或藻类的生长，但应注意，由于缺乏风化影响，内部表面的生长模式与外部不同。 它主要用于测试样本，但也可用于评估较大结构（如整个房屋）上的霉菌生长。如果这用于大面积，则应将项目分解为较小的部分。 1.3 该方法仅用于表面缺陷的宏观评级。视觉刻度旨在由肉眼对较大表面区域（如测试板、壁板或整个建筑物）上的藻类、真菌或污垢缺陷进行评级。包括区分土壤和污垢的技术。 1.4 真菌会在大多数暴露在室外的漆膜上生长，这些漆膜位于有利于生长的条件下。测试程序，如实践 D1006 , D3456 和 G7集团 描述了可用于暴露漆膜的自然暴露试验，以产生真菌或藻类生长。 1.5 可用于本试验方法的图形参考为评定漆膜上真菌或藻类生长的程度提供了数字基础。 1.6 本标准并非旨在解决与其使用相关的所有安全问题（如有）。 本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.7 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 4.1 漆膜表面和漆膜内的真菌生长是漆膜表面变色或变形的主要原因。由于其色素沉着较深，通常很难将真菌与泥土或土壤颗粒区分开来。 4.2 图形标准的使用: 4.2.1 作为本试验方法一部分的图形参考用于说明目的，并可用于视觉比较。 4.2.2 这些图表示漆膜上各种生长水平的理想示意图。它们仅用于表示，但将作为确定增长数量和类型的有用指南。 4.2.3 中所示的图表 图1 不是从线性比例导出的。该量表旨在为真菌或藻类生长的早期阶段提供更多的区分。正是在这些层面上，更大的洞察力是必要的。 4.2.4 在深色基板上进行比较要困难得多，因此需要更加小心和注意。必须注意的是，由于很难在非常暗的基质上区分轻微的真菌或藻类生长，因此可能有低估这些样本的趋势。

1.1 Fungal growth, frequently referred to as mildew in the paint industry, causes defacement of paint film exposed outdoors. The visual rating of paint surface disfigurement due to fungal or algal attack is required in order to compare the performance of different coatings. 1.2 This method of rating mildew evaluation is intended to be used on exterior exposed paint films. This method may be used to rate interior fungal or algal growth, but it should be noted that the growth patterns on interior surfaces are different than exterior due to the lack of weathering influences. It is primarily intended for test specimens, but can also be used for rating mildew growth on larger structures such as entire houses. If this is used for large areas, the project should be broken down into smaller sections. 1.3 This method is intended for field use for the macro rating of surface disfigurement only. The visual scales are meant to be used by the unaided eye to rate algal, fungal, or dirt disfigurement on larger surface areas such as test panels, siding boards, or entire buildings. Techniques are included for the differentiation of soil and dirt. 1.4 Fungi will grow on most paint films exposed outdoors that are located in conditions favorable to growth. Test procedures such as Practices D1006 , D3456 , and G7 are available describing natural exposure tests that can be used to expose paint films, in order to create fungal or algal growth. 1.5 The pictorial references available for use with this test method provide a numerical basis for rating the degree of fungal or algal growth on paint films. 1.6 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 4.1 The growth of fungi in and on the surface of paint films represents a major cause of discoloration or disfigurement of painted surfaces. Because of their dark pigmentation, it is frequently difficult to distinguish fungi from dirt or soil particles. 4.2 Use of Pictorial Standards: 4.2.1 The pictorial references that are part of this test method are for illustration purposes and may be used for visual comparisons. 4.2.2 The diagrams represent an idealized schematic of various growth levels on paint films. They are intended as a representation only, but will serve as a useful guideline to establish amount and type of growth. 4.2.3 The diagrams represented in Fig. 1 are not derived from a linear scale. The scale is intended to provide for more discrimination at the earlier stages of fungal or algal growth. It is at these levels that greater discernment is necessary. 4.2.4 Comparisons made on dark colored substrates will be much more difficult, and will therefore require much more care and attention. It must be noted that because it is difficult to distinguish mild fungal or algal growth on the very dark substrates, there may be a tendency to under-rate those specimens.