On hazardous substances in welding and allied processes;

In this paper we have collected relative regulations about hazardous substances in electrical and electronic equipments from EU, North Afarican and Japan, which are major exporting countries or areas of our electrical and electronic equipments, and analysed them deeply.

The hazardous substances in welding and allied processes have two kinds of states,which including graininess and gaseous state.

This paper gives an overview of policies and measures taken by international organizations,regional organizations and some major countries to solve problems on electrical and electronic products hazardous substance.

The hazardous substances produced during welding processes are introduced in this paper.

The paper sums up the experiences from the management works of hazardous substance in elec- tronic manufacturing enterprises, expatiates that electronic manufacturing enterprises should establish organizations which are seasoned with the management of hazardous substance and should enforce the management methods to control hazardous substance in enterprises.

Influence of the new international regulations about the limit of harmful substances in coatings for toys on the coatings industry and countermeasures to them

Analyses show that the harmful substances contained in textiles mainly come from harmful dyes,heavy metals, pesticides,organic chloride and phosphide, formaldehyde,and chemicals irritant to human skin.

This article has described the main variation between the revised GB18581 standard and the current standard of GB18581—2001"indoor decorating and refurbishing materials—limit of harmful substances of solvent coatings for woodenware".

Analysis on harmful matter in building waterproofing coating and development of professional standard;

Based on GB18585-2001 "Limits for Harmful Matters in Indoor Decorating and Fitting-up Wall Paper" and the manufacturing process of fiberglass wallcovering clothes, two types of harmful matters, i.

Through a few poisonous events happened in application of building waterproofing coatings, the article says it is urgent to develop standards for limit of harmful matter in building waterproofing coatings.

This paper determines the quality of surface drinking water from the aspects of different heating temperatures and boiling time, gives a primary probe on the changing rules of harmful materials and its principles in drinking water.

The matrix quality is changed and the safety coefficient is improved through the reaction of rare earth elements with other harmful materials.