1.1 This standard specifies methods of sampling and digestion prior to analysis of the total concentration of the elements antimony, arsenic, barium, cadmium, chromium, lead, mercury, and selenium from toy materials and from parts of toys.
Note: Other elements can be determined by this method provided adequate analytical performance is demonstrated. Manufacturers are encouraged to apply the test methods of this standard and the limits from GB 6675.4-2014 to raw materials used in the manufacture of toys to give increased certainty of conformity to the requirements of GB 6675.4-2014.
1.2 This standard is applicable to the following types of toy materials:
——coatings of paints, varnishes, lacquers, printing inks, polymers, and similar coatings;
——polymeric and similar materials, including laminates, whether textile-reinforced or not, but excluding other textiles;
——paper, paperboard and cardboard;
——natural or synthetic textiles;
——metallic materials whether coated or not;
——other materials, whether mass-coloured or not (e.g. wood, fibreboard, hardboard, bone, and leather);
——materials intended to leave a trace (e.g. the graphite materials in pencils and liquid ink in pens);
——pliable modelling materials, including modelling clays and gels;
——paints to be used as such in the toy, including finger paints, varnishes, lacquers, enamel powder and similar materials in solid or liquid form;
——packaging materials that form part of the toy or have intended play value.
Note: Digestion methods for glass, ceramic, and other siliceous materials or fluorinated polymers or fluorinated polymer coatings are not described, and these types of materials are outside the scope of this standard (see Annex A, A.1).
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB 6675.2 Safety of toys - Part 2: Mechanical and physical properties (GB 6675.2-2014, ISO 8124-1:2000, MOD)
GB 6675.4 Safety of Toys - Part 4: Migration of certain elements (GB 6675.4-2014, ISO 8124-3:2010, MOD)
GB 6675.14 Safety of toys - Part 14: Requirements and test methods of finger paints
GB/T 6682 Water for Analytical Laboratory Use - Specification and Test Methods (GB/T 6682-2008, ISO 3696:1987, MOD)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
base material
material upon which coatings (3.2) can be formed or deposited
3.2
coating
all layers of material formed or deposited on the base material of a toy, including paints, varnishes, lacquers, inks, polymers, or other substances of a similar nature, whether they contain metallic particles or not, no matter how they have been applied to the toy
Note: This definition includes metallic coatings deposited on a metal surface such as an electroplated coating. However, electroplating will only require testing if it can be removed by scraping (3.6); otherwise, it may be tested with the base material.
3.3
laboratory sample
toy either in the form in which it is marketed, or in the form in which it is intended to be marketed
3.4
test portion
single material taken from an accessible part of a laboratory sample (3.3)
3.5
composite test portion
test portion that is composed of more than one similar material type or colour of material
Note: This definition precludes the compositing of dissimilar materials, e.g. compositing textiles and paint coatings are not permitted.
3.6
scraping
mechanical process for removal of coatings (3.2) down to the base material (3.1)
3.7
complete digestion
complete breakdown of the original material leaving only insoluble residues
3.8
sample blank
solution that has undergone the same digestion processes used for the digestion of test portions (3.4) and consists of all reagents excluding the test portion
3.9
detection limit of a method
three times the standard deviation of the result obtained in the sample blank (3.8) using the method adopted by laboratory
GB/T 38423-2019 The following standards are cited：
