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SAFETY SIGN
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Formats of safety mark |
Format of safety mark and color shall be classified into 4 categories according to the purpose of mark's indication as shown in Table 2.
Figure's symbol shall be shown at center of the mark without over-writing the cross band of "Prohibition sign" |
Category |
Format |
Color |
Remark |
| Prohibition Sign | ![]() |
Background color : White Color of strip along circel border and cross strip : Red Color of figure's symbol : Black |
Area of red color must be at least 35% of the total area of mark. |
| Mandatory sign |
![]() |
Background color : Blue Color of figure's symbol : White |
Area of blue color must be at least 50% of the total area of mark. |
| General information mark concerning safety status |
![]() |
Background color : Green Color of figure's symbol : White |
Area of green color must be at least 50% of the total area of mark. Rectangular shape can be used as well. |
| Warning sign |
![]() |
Background color : Yellow Color of figure's symbol : Black |
Area of yellow color must be at least 50% of the total area of mark. |
Supplementary marks
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Format of supplementary marks, rectangular or square shape.
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Background color must be similar to safety color, and the text color must be intersect color as indicated in Table 1, or white shall be used as background color while black shall be used as text color.
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The characters used in the text, spacing between the characters, shall not be different more than 10% /format of the characters must be plain type without shadow or style /width of characters must not be less than 70% of its height.
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Show the supplementary mark under the safety mark.
Format of supplementary marks, rectangular or square shape.
Background color must be similar to safety color, and the text color must be intersect color as indicated in Table 1, or white shall be used as background color while black shall be used as text color.
The characters used in the text, spacing between the characters, shall not be different more than 10% /format of the characters must be plain type without shadow or style /width of characters must not be less than 70% of its height.
Show the supplementary mark under the safety mark.
Remark : Table 1, 2 are referred from the Thai Industrial Standard, TIS. 635 Vol. 1 to 2-2529, Safety colors and safety marks, Thai Industrial Standards Institute, Ministry of Industry.
Size of safety marks |
Table 3 : Size of the safety marks and the characters used in supplementary marks
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FlammabilityFlash Point |
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Health4-Deadly dangerous |
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Reactivity4-Explosive |
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Special informationOXY-Oxidize |


Safety Sign

























