Fumes are formed when the material from a volatilised solid condenses in cool air. Fumes are extremely fine - usually less than 1.0 micrometer in diameter. In most cases the hot vapour reacts with the air to form an oxide. Fumes are often associated with molten metals, especially in processes such as welding. At high fume concentrations, agglomeration of particles may result in particles with much larger dimensions.
Small particles created in high heat operations such as welding or soldering that become airborne when exposed to heat. Fume particles are very small and tend to remain airborne for long periods of time. Metals, some organic chemicals, plastics and silica can produce fume particles.
Fumes are formed by processes such as sublimation or condensation and is the term generally applied to particles condensed from the gaseous state (e.g. metal fumes, polymer fumes).
Irritating smoke, vapor or gas.
Extremely small particulates usually formed as a by-product of high heat.
Airborne solid particles usually less than 1 micrometer (um) in size formed by condensation of vapors, sublimation, distillation, calcination, or chemical reaction.
Small solid particles formed by the condensation of vapors of solid materials.
A general term for vapors, gases, or smoke.
An airborne dispersion consisting of minute solid particles arising from the heating of a solid (such as molten metal, welding). This heating is often accompanied by a chemical reaction where the particles react with oxygen to form an oxide.