AURORA, CO -- Advanced Circuits, the third-largest printed circuit board fabricator in North America, is celebrating its 25th anniversary this month. The fabricator, which was launched in April 1989, has grown from a five-person board shop to over 500 employees in three facilities across the US.

AURORA, CO -- Advanced Circuits, the third-largest printed circuit board fabricator in North America, is celebrating its 25th anniversary this month. The fabricator, which was launched in April 1989, has grown from a five-person board shop to over 500 employees in three facilities across the US.

Does anyone use HASL (hot air surface leveling) anymore? It's also known as HAL.

Millions of pounds of chemical products are shipped between countries daily. The Global Harmonized System (GHS) is being implemented to aid in the communication of hazards and risks. The UN Conference on the Environment and Development (UNCED) met in 1992 and decided that global standards for chemical classification and labeling were needed. Every country had different requirements, causing confusion and increasing risk of serious accidents.