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GB8771-2007
Maximum limits for soluble elements content of pencil coating
铅笔涂层中可溶性元素最大限量
GB 8771-2007 — действующий обязательный национальный стандарт Китая: Maximum limits for soluble elements content of pencil coating. Отрасль: Пищевая. Тема: Безопасность продукции. Дата вступления в силу: 1 янв. 2008 г..
Применимость зависит от продукции, схемы сертификации, уведомлений компетентных органов и переходных правил. Закажите перевод или проверьте источник, прежде чем использовать эту запись в решениях по соответствию.
Обзор требований
Этот обзор пока доступен только на английском языке.
Область применения
This standard applies to various coated graphite pencils and colored pencils. It specifically regulates the maximum limits of soluble elements within the coatings of these writing instruments. It is mandatory for all manufacturers producing pencils for the Chinese market to ensure child safety regarding heavy metal exposure.
Технические требования
GB 8771-2007 establishes the maximum concentration limits for eight soluble elements in pencil coatings: antimony, arsenic, barium, cadmium, chromium, lead, mercury, and selenium. Instead of measuring total heavy metal content, the standard focuses on the bioavailability of these elements, simulating the amount that could be extracted by gastric acid if ingested by children. To account for analytical variances, the standard introduces an analytical correction factor for each element. The corrected analytical result must be equal to or lower than the specified maximum limits to be deemed compliant. Furthermore, manufacturers must provide a quality certificate for every batch of factory products, ensuring full adherence to the regulatory limits.
Методы испытаний
The testing procedures heavily rely on the methodologies established in GB 6675 (National Toy Safety Technical Specification). The process involves physically scraping the coating material from the pencil's base material, ensuring a minimum sample size of 10mg. The sample is then prepared and extracted using a solution that simulates human gastric juice. Finally, quantitative determination of the soluble elements is conducted using appropriate analytical methods selected based on the required detection limits.
Частые вопросы
What products are regulated under GB 8771-2007?
This standard applies to all types of coated graphite pencils and colored pencils, specifically regulating the soluble elements in their coatings.
Are there any updates from the previous version of GB 8771?
The 2007 version replaces the previous GB 8771-1988. It expands the regulated substances from only lead to a total of eight soluble elements (Sb, As, Ba, Cd, Cr, Pb, Hg, Se) and updates the corresponding testing methodologies.
How does GB 8771-2007 differ from ISO standards?
GB 8771-2007 aligns closely with international guidelines, specifically referencing ISO 8124-3:1997 regarding the migration of certain elements. It also adopts the testing procedures and definitions established in the Chinese national toy safety standard, GB 6675.
The summary above provides a high-level overview of GB 8771-2007. To ensure complete compliance for your products entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 8771-2007 today to access all detailed parameters, analytical correction tables, and testing procedures.
Подсказки по применимости
- Тип
- Здоровье и гигиена
- CCS
- C56
- ICS
- 13.100
- Компетентное ведомство
- National Disease Control and Prevention Administration
- Технический комитет
- National Disease Control and Prevention Administration
Связи
Заменяет:GB 8771-1988