Soldering terminology

Transition of a solid body in to gaseous state and vice versa, without first turning into liquid. Among others, sulfur sublimes when heated. Examples for sublimation at room temperature and normal pressure: camphor, iodine and CO₂ (dry ice). Since sublimation is an endothermic reaction, dry ice is used for cooling solder paste in storage and transport, containing chemical reactions that take place at room temperature.