Toy Safety Standard (ST Standard)
- Toy Safety Standard (ST Standard) is a voluntary standard of Japan Toy Association. Toys that pass ST standard can show ST mark.
ST Part III: Chemical Properties
- We will examine if the toy contains or elutes harmful coloring agent, heavy metal etc.
- For raw materials used, such as resin, rubber, wood, metal, paper etc., parts, coating of toys, we will examine the following harmful chemical substances to check whether these substances are contained or eluted within required level.
Heavy metal
- Elution of lead, arsenic and cadmium
- In addition to above, elution of chromium, mercury, antimony, selenium and barium from coating
Coloring matter
- Examination that coloring matter is not eluted (For paper and textile, elution of coloring matter is allowed within specified value)
- In case coloring matter is eluted, confirmation of permitted coloring matter* is required.
(Permitted coloring matter* : coloring matter listed in Attached Table 1 of ordinance for Enforcement of the Food Sanitation Law)
Plasticizer
- Content of 6 kinds of phthalates. (DEHP, DBP, BBP, DINP, DIDP, DNOP)
Impurities
- Evaporation residue test: amount of water soluble substances eluted
- Consumption of potassium permanganate: amount of eluted organic matters and oxidizable substances
Material Identification
- The above examination is conducted for each kind of material as required by standard. When the material is unknown, Fourier transform Infrared (FTIR) and X-ray fluorescence (XRF) analysis will be conducted to identify the concerned material.
