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GB/T 1733-1993: Determination of resistance to water of films Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure GB/T 1733: Historical versions
GB/T 1733-1993: Determination of resistance to water of films---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT1733-1993GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA GB/T 1733-93 Replacing GB 1733-79 Determination of Resistance to Water of Films APPROVED ON: MARCH 20, 1993 IMPLEMENTED ON: DECEMBER 01, 1993 Approved by: State Administration of Technical Supervision Table of Contents1 Thematic Content and Applicable Scope ... 3 2 Normative References ... 3 3 Materials and Equipment ... 3 4 Sampling ... 3 5 Processing and Painting of the Underplate ... 3 6 Drying of Test Panels ... 4 7 Determination of the Thickness of Paint Film ... 4 8 Coating of the Edge of the Test Panel ... 4 9 Test Procedure ... 4 10 Test Report ... 5 Determination of Resistance to Water of Films1 Thematic Content and Applicable ScopeThis Standard specifies the methods for determining the water resistance of paint films, including two methods: the water immersion test method and the immersion in boiling water test method. After reaching the specified test time, the water resistance of the paint film is expressed by the phenomenon of the surface change of the paint film.2 Normative ReferencesGB 1727 General Preparation of Paint Film GB 1764 Method for Determining the Thickness of Paint Film GB 3186 Sampling Paint Products GB 6682 Water for Analytical Laboratory Use - Specification3 Materials and Equipment3.1 Underplate: The underplate shall be flat and free of distortion; and the plate surface shall be free of any visible cracks and wrinkles. Unless otherwise specified, the underplate shall be tinplate with a size of 120mm×25mm×0.2~0.3 mm. 3.2 Distilled water or deionized water meets the requirements of the Class-III water specified in GB 6682. 3.3 Glass water tank.4 SamplingUnless otherwise specified, it shall be carried out in accordance with the provisions of GB 3186.5 Processing and Painting of the UnderplateUnless otherwise specified, prepare paint film on three tinplate (3.1) according to the the product standard. 9.2 Method-B: Immersion in boiling water test method 9.2.1 Immersion of test panels Add distilled water or deionized water (3.2) to the glass water tank (3.3). Unless otherwise specified, keep the water (3.2) in a boiling state until the end of the test. Put three test panels into it, and immerse 2/3 of the length of each test panel in water. 9.2.2 Inspection of test panel Check and evaluate the test panel in accordance with the provisions of 9.1.2 specified in Method-A.10 Test ReportThe test report shall include the following: a. The model and name of the tested product; b. Explain the use of this national standard (GB/T 1733) and which method (Method- A or Method-B); c. Any difference from the content specified in this national standard; d. Test results (detailed records of paint film damage and evaluation results); e. Test date. ____________________ ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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