It specializes in sinks, exhaust hoods, hobs and ovens. Most fume hoods for industrial purposes are ducted. A large variety of ducted fume hoods exist. Most acid baths are built with ventilation hoods above them. Kitchen hoods are broadly classified into ducted hoods and ductless hoods. Neither are most BSCs safe for use as fume hoods. Women wore veils, kerchiefs, hoods, caps and wimples. For these cloaks and hoods red, Irish cloth was popular. This requires that all range hoods have a vent that discharges outside. Most modern stoves come in a unit with built-in extractor hoods. Some modern stoves come in a unit with built-in extractor hoods. Microbiology laboratories use UVGI to disinfect surfaces inside biological safety cabinets ("hoods") between uses. Most British Mk IIIs were equipped with Malcolm hoods. These types of range hoods are usually used in houses. The use of smoke hoods or misting systems were also examined although both were rejected.