Kahulugan at paggamit

3.1 Microbial growth is the main cause of paint film discoloration and deterioration. This guide describes the techniques used to distinguish fungi and algae from other surface contaminants.

3.2 Recoating a surface contaminated with fungus or algae usually results in a more rapid infestation of the new paint than repainting a surface that has been removed from fungal or algal growth. Bukod pa rito, poor adhesion, staining/bleeding, and many other problems may result. This guide describes ways to remove fungal or algal growth before repainting.

Tala 1: It is important to read and follow all steps and notes. Sa partikular na, the washing steps outlined in 5.2.2 at 5.2.4 need to be carried out completely, as residual sodium hypochlorite (bleach) can cause many of the same problems, or even lose coloring after repainting, and residual phosphate detergents can further promote fungal and algal growth.

Tala 2: This procedure is suitable for recoating surfaces. Reports of using this procedure to remove fungi and algae without recoating need to include a warning about the adverse effects of bleach on the coating. The oxidation of bleach will reduce the performance of the film, especially the “bleaching” (color loss) in the film containing organic pigments (such as quinacridone, atbp.), the reduction of gloss, pulbos, atbp. Small patches need to be tested before using this program for this purpose.

ASTM D4610-1998 Standard Guide for Determining the Growth and Removal of Microorganisms (Fungi or Algae) on Paints and Related Coatings

Hakbang 1: Saklaw

1.1 This guide describes techniques for determining the presence of fungal or algal growth on paints and related coatings, and methods for removing such growth prior to recoating.

1.2 Values expressed in SI units shall be considered standard. Ang mga halaga na ibinigay sa mga panaklong ay para sa sanggunian lamang.

1.3 Ang pamantayang ito ay hindi nilayon upang matugunan ang lahat ng mga alalahanin sa kaligtasan, kung meron man, na nauugnay sa paggamit nito. Responsibilidad ng mga gumagamit ng pamantayang ito na magtatag ng angkop na kaligtasan, mga kasanayan sa kalusugan at kapaligiran at upang matukoy ang pagiging angkop ng mga paghihigpit sa regulasyon bago gamitin.

1.4 Ang internasyonal na pamantayang ito ay batay sa mga internasyonal na kinikilalang pamantayan na mga prinsipyo na itinatag sa “Desisyon sa Mga Prinsipyo para sa Pag unlad ng Internasyonal na Pamantayan, Mga Patnubay at Rekomendasyon” inisyu ng Committee on Technical Barriers to Trade (TBT) ng World Trade Organization.