Safety signs

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　　Markings that consist of safety colors, geometric shapes, and graphic symbols to convey specific safety information are called safety signs. The purpose of safety signs is to draw people’s attention to unsafe factors and prevent accidents. Safety signs are divided into four categories: prohibition signs, warning signs, instruction signs, and guidance signs. 　　**Standard GB2894－82 \"Safety Signs\" specifies in detail the dimensions of safety signs, the color of the backing, methods of production, locations for installation, inspection and maintenance, as well as the geometric shapes of various types of safety signs, the number of signs, the colors of the graphics, and any supplementary signs. The textual description of safety signs must be used in conjunction with the safety signs themselves. The supplementary sign should be located below the geometric shape of the safety sign, with the text available in both horizontal and vertical formats. 　　The geometric shape of the prohibition sign is a ring with slashes; the background of the shape is white, the ring and slashes are red, and the symbol itself is black. There are 16 types of prohibition signs, including no open flames, no smoking, no use of water to extinguish fires, no entry, no placement of flammable materials, no carrying of fire sources, no starting, no rotation during maintenance, no refueling while in operation, no crossing, no riding, no climbing, no drinking, no setting up ladders, no entry, and no staying. 　　The geometric shape of the warning sign is a triangle; the background of the shape is yellow, while the triangle’s borders and the symbol itself are black. Warning signs include: Beware of safety hazards, Beware of fire, Beware of explosion, Beware of corrosion, Beware of toxicity, Beware of electric shock, Beware of mechanical injuries, Beware of hand injuries, Beware of hanging objects, Beware of punctures, Beware of falling objects, Beware of falls, Beware of vehicles, Beware of arc flashes, Beware of roof collapses, Beware of gas, Beware of landslides, Beware of pits, Beware of high levels of radiation, Beware of fissionable materials, Beware of lasers. 23 items such as beware of microwaves, beware of slips, etc. Instruction flags are markers that remind people of the rules that must be followed. The geometric shape is circular, the background is blue, and the graphic symbol is white. The instruction signs include 8 types: protective glasses must be worn, a gas mask must be worn, a safety helmet must be worn, ear protection must be worn, protective gloves must be worn, protective boots must be worn, a seat belt must be worn, and protective clothing must be worn. 　　A guide sign is a safety sign that indicates the target direction. The geometric shape is rectangular, and depending on the ratio of its long and short sides, it is divided into two categories: general warning signs and warning signs for fire-fighting equipment. The background of the indicator graphic is green, with the graphic symbols and text in white. Common warning signs include emergency exits and safety passages, while fire-related warning signs include a fire alarm, fire emergency phone number, underground fire hydrants, above-ground fire hydrants, fire hoses, fire extinguishers, and fire pump connectors – a total of 7 types.