Glossary | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | Fatty acids The principal part of many vegetable and animal oils and greases, also known as carboxylic acids which embrace a wider definition. These are common contaminants that solvents are used to remove. They are also used to activate fluxes.   Flammable Anything that will ignite easily and burn rapidly. The National Fire Protection Association and the Department of Transportation (DOT) define flammable liquids as those having a flash point less than 100 F and a vapor pressure of not over 40 psia at 100 F.   Flash Point The temperature at which a liquid or volatile solid gives off vapor sufficient to form an ignitable mixture near the surface of the liquid or within the test vessel.   Flux An essential chemical employed in the soldering process to facilitate the production of a solder joint. It is usually a liquid or solid material, frequently based on rosin.   | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | State Information | Glossary | Conversion Checklist | Comments Home | Process Advisor | Alternatives | Links | Search All SAGE material, Copyright© 1992, Research Triangle Institute Last Update: 09 March 1999 sage@rti.org http://clean.rti.org/gloss.cfm?letter=F