Welding and soldering discharges dust and fumes which even the most advanced production technologies cannot prevent. Collection, extraction and separation is generally required for manufacturing, product-specific, labor and environmental protection reasons.
The handling of welding fumes is frequently made more problematic by the fact that they may represent a health hazard, be toxic or even carcinogenic. When welding stainless steel (CrNi-steel) in particular, individual laws must be observed regarding clean air recirculation.
Gaseous matter might be adhesive or odorous during soldering processes.