Standard No.:	GB/T 9780-2013
English Name:	Test Method for Dirt Pickup Resistance and Stain Removal of Film of Architectural Coatings and Paint
Chinese Name:	建筑涂料涂层耐沾污性试验方法
Chinese Classification:	Q18    Decorative material
Professional Classification:	GB    National Standard
Issued by:	AQSIQ;SAC
Issued on:	2013-11-27
Implemented on:	2014-8-1
Status:	valid
Superseding:	GB/T 9780-2005 Test method for dirt pickup resistance of film of architectural coatings and paints
Language:	English
File Format:	PDF
Word Count:	5000 words
Price(USD):	80.0
Delivery:	via email in 1 business day

1 Scope This Standard specifies test method for dirt pickup resistance and stain removal of film of architectural interior and exterior wall coatings and paint. This Standard is applicable to determination on dirt pickup resistance and stain removal of decorative and protective film of interior and exterior wall surface and roof surface for buildings and constructions. 2 Normative References The following references are indispensable for the application of this Standard. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies. GB/T 250 Textiles-Tests for Colour Fastness - Grey Scale for Assessing Change in Colour GB 1790 Medical Vaseline GB/T 3186 Paints, Varnishes and Raw Materials for Paints and Varnishes - Sampling GB/T 6682 Water for Analytical Laboratory Use - Specification and Test Methods GB/T 7044 Colour Carbon Black GB/T 9266 Determination of Scrub Resistance of Film of Architectural Paints and Coatings GB/T 9271-2008 Paints and Varnishes - Standard Panels for Testing GB/T 9761-2008 Paints and Varnishes - Visual Comparison of the Colour of Paints GB/T 13171.2 Laundry Powder (Phosphate Free) GB/T 18623 Products of Geographical Indication - Zhenjiang Vinegar GB/T 23981-2009 Determination of Contrast Ratio of White and Light Coloured Paints GB/T 24690 Teabag JC/T 412.1-2006 Fiber Cement Flat Sheets part 1: Non-Asbestos Fiber Cement Flat Sheets QB/T 1745.1 Fountain pen inks - Part1: Non-Pigmentinks YY 0331 Performance Requirements and Test Methods for Absorbent Cotton Gauze and Absorbent Cotton and Viscose Gauze 3 Principle As for the exterior wall coating and paint, gray standard sample is used as the pollution source in the film's dirt pickup resistance and stain removal test. The sample is produced into suspension liquid, and then is attached to the test plate via brushing or dipping. The dirt pickup resistance and stain removal properties are assessed according to the change of the reflection coefficients before and after the test, or according to the color shading grade of the basic gray card. Test methods for dirt pickup resistance and stain removal of film of exterior wall coating and paint are divided into brushing method and dipping method. The former is applicable to level film while the latter is applicable to uneven or rough-surfaced film. As for the interior wall coating and paint, common life stain is used as the pollution source in the film's dirt pickup resistance and stain removal test. The stain is attached to the test plate via dipping or scraping. The comprehensive capacities of dirt pickup resistance and stain removal are assessed via weighing of the dirt pickup resistance and stain removal of different life stain.

Foreword I 1 Scope 2 Normative References 3 Principle 4 General Principles 5 Test Method for Dirt Pickup Resistance and Stain Removal of Film of Exterior Wall Coatings and Paint 6 Test Method for Dirt Pickup Resistance and Stain Removal of Film of Interior Wall Coatings and Paint 7 Test Report