GB/T 34676-2017Interior wall coatings for children's room decorating (English PDF)

3.1 Volatile organic compounds; VOC

Any organic liquid and/or solid that can naturally evaporate at the normal temperature and pressure of the atmosphere.

3.2 Volatile organic compound content

The mass of volatile organic compounds presented in the coating as measured under specified conditions.

5.1 Quality performance requirements

The quality performance of the product shall comply with the requirements of Table 1.

5.2 Limit requirements for hazardous substances

The hazardous substances limit of the product shall comply with the requirements of Table 2.

6.1 Sampling

The product is sampled in accordance with GB/T 3186, it can also be sampled in accordance with the agreed method. The amount of sampling is determined in accordance with the inspection needs.

6.4 Preparation of test panel

6.4.1 Specimen preparation

When the product to be inspected is not clearly indicated of the dilution ratio, stir it evenly and then make a slab. When the product to be inspected indicates the dilution ratio, except for the contrast ratio item, for all the items that need to be tested by preparing slab, it shall prepare the slab after mixing it uniformly in accordance with the specified dilution ratio. If the ratio is a certain range, it shall take the middle value.

6.4.2 Preparation of primer test panel

6.4.2.1 The primer panel is made by brushing method. Each sample is first measured for density D in accordance with the provisions of GB/T 6750-2007, the brushing mass is calculated in accordance with formula (1).

6.4.2.2 Unless otherwise agreed, the substrate type, test panel size, test panel quantity, brushing amount and curing period of each test item of primer shall comply with the requirements of Table 3.

6.4.3 Preparation of finish test panel

6.4.3.1 Unless otherwise agreed, except for the workability, film appearance, scrub resistance and stain resistance comprehensive item, the rest of the finish required for inspection for panel preparation uses the wire rod applicator which is made by stainless steel materials for panel preparation.

6.4.3.2 Unless otherwise agreed, the type of substrate, the size of the test panel, the number of test panels, the size of the applicator, the number of application courses and the curing period of each inspection item of the finish shall comply with the requirements of Table 5. When two courses are applied, the two courses are applied by a time interval of 6 h.

6.5 Method of operation

6.5.1 General requirements

Unless otherwise specified, only reagents identified as chemically pure and of above purity and distilled or deionized water in accordance with the grade III water requirements of GB/T 6682-2008 are used in the test. The test solution was pre-adjusted to the test temperature before the test.

6.5.4 Drying time

It is performed in accordance with the provisions of Table B of GB/T 1728-1979.

6.5.5 Appearance of paint film

The test panel after the test of 6.5.3 is placed for 24 hours, perform visual inspection against the coating film, if there is no significant shrinkage cavity and the coating film is uniform, it is rated as "normal".

7.1 Inspection classification

7.1.1 Product inspection is divided into exit-factory inspection and type inspection.

7.1.2 The primer exit-factory inspection items include the state in the container, the workability, the drying time, and the appearance of the film.

7.2 Determination of inspection results

7.2.1 The judgment of the inspection result shall be carried out in accordance with the provisions of the rounding off value comparison method in GB/T 8170-2008.

7.2.2 When the test results of all items meet the requirements of this standard, the test samples are in compliance with the requirements of this standard.

8.1 Marking

It is performed in accordance with the provisions of GB/T 9750. If it needs to add water to dilute, it shall specify the dilution ratio.

8.2 Packaging

It is performed in accordance with the provisions of the secondary packaging requirements of GB/T 13491.

8.3 Storage

When storing the product, it shall be ventilated, dry, and protected from direct sunlight. In winter, it shall take appropriate anti-freezing measures. […]