GB28231-2011

General provisions of safety and health for writing boards

书写板安全卫生要求

GB 28231-2011 é uma norma nacional chinesa obrigatória vigente: General provisions of safety and health for writing boards. Setor: Alimentos. Foco: Segurança de produtos. Entrada em vigor: 1 de mai. de 2012.

A aplicabilidade depende do escopo do produto, da via de certificação, dos avisos da autoridade competente e das regras de transição. Solicite uma tradução ou verifique a fonte antes de usar este registro em uma decisão de conformidade.

Visão geral de conformidade

Esta visão geral está disponível por enquanto apenas em inglês.

Escopo e aplicabilidade

This standard specifies the safety and health requirements for writing boards (chalkboards and whiteboards) used in educational environments. It applies to boards used in general classrooms, laboratories, and specialized classrooms across various types of schools. It is not applicable to electronic display boards or notice boards, nor does it cover the electrical control parts of writing boards. Manufacturers of educational equipment must ensure compliance with this standard for the Chinese market.

Requisitos técnicos

The standard outlines comprehensive physical and chemical requirements for writing boards. Key technical parameters include color attributes (lightness, hue, and chroma), glossiness limits to prevent glare, and surface roughness specifications for chalkboards. It also mandates performance criteria for writability, erasability, wear resistance, light fastness, and corrosion resistance. A critical aspect of this standard is the formaldehyde emission limit. The formaldehyde emission must not exceed 1.5 mg/L, as measured by the desiccator method specified in GB/T 17657-1999. This is a mandatory clause to ensure the health and safety of students and teachers. Additionally, the standard defines structural and safety requirements, including edge rounding (minimum R5mm), secure installation, and noise limits for sliding boards. It also specifies nominal dimensions and appearance quality, ensuring that surfaces are flat, uniform in color, and free from defects like cracks or bubbles.

Métodos de ensaio

Testing procedures include visual and instrumental color measurement using the Chinese color system or Munsell color charts. Glossiness is measured using a 60° geometry gloss meter. Writability and erasability are evaluated through standardized writing and wiping tests. Light fastness is assessed by exposing samples to natural or artificial daylight and comparing them against blue wool standards and grey scale cards as per GB/T 250 and GB/T 730.

Perguntas frequentes

What products are regulated under GB 28231-2011?

It regulates chalkboards and whiteboards used in schools and other educational settings, including general classrooms, laboratories, and specialized classrooms.

Is the formaldehyde emission limit mandatory under this standard?

Yes, the formaldehyde emission limit specified in clause 4.9 is a mandatory requirement, while the other technical clauses in the standard are recommended.

Does GB 28231-2011 cover electronic whiteboards?

No, it explicitly excludes electronic memory transmission display boards and notice boards. It also does not cover the electrical control parts of writing boards.

The summary above provides a high-level overview of GB 28231-2011. 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 28231-2011 today to access all detailed parameters, tables, and testing procedures.

Indicações de aplicabilidade

Tipo: Saúde e higiene
CCS: C56
ICS: 13.100
Órgão competente: National Disease Control and Prevention Administration
Comitê técnico: National Disease Control and Prevention Administration