GB/T 9780-2013 in English

《GB/T 9780-2013建筑涂料涂层耐沾污性试验方法》由TC195（全国轻质与装饰装修建筑材料标准化技术委员会）归口，主管部门为中国建筑材料联合会。

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