luda 客户：
张贴在集装箱体的标牌(PLACARD)颜色和细节有哪些规范呢？
密尔克卫：
最权威IMDG CODE 关于危险品标牌尺寸的规定如下：
5.3.1.2.1
Exceptas provided in 5.3.1.2.2 for the class 7 placard, and in 5.3.2.3.2 for themarine pollutant mark, a placard shall be configured as shown in the figurebelow.
The placard shall be in the form of a squareset at an angle of 45° (diamond-shaped). The minimum dimensions shall be 250 mm × 250 mm (to theedge of the placard).（参考翻译：最小尺寸为250mm×250mm(贴在标牌边缘)。The line inside the edge shall be parallel and12.5 mm from the outside of that line to the edge of the placard. The symboland line inside the edge shall correspond in colour to the label for the classor division of the dangerous goods in question. The class or divisionsymbol/numeral shall be positioned and sized in proportion to those prescribedin 5.2.2.2 for the corresponding class or division of the dangerous goods inquestion.
The placard shall display the number of the class or division (andfor goods in class 1, the compatibility group letter) of the dangerous goods inquestion in the manner prescribed in 5.2.2.2 for the corresponding label, indigits not less than 25 mm high. Where dimensions are not specified, allfeatures shall be in approximate proportion to those shown.
正确标牌应该为（除第7类和海洋污染物外）：
标牌须是与水平线呈45度角（菱形）放置的正方形。最小尺寸必须是250mmX250mm，内边缘线须与（外）边缘线平行且相距12.5MM。内边缘线须和符号与相应危险货物类别或分类标志颜色一致。
那么，当我们遇到危险品标牌与箱体颜色相近时，应该注意什么呢？我们先看看下面这个标牌贴的正确吗？
我们发现标牌的颜色是红色的，而集装箱箱体的颜色也是红色的，两者没有鲜明的对比色，关于此点，IMDGCODE作了如下规定:
5.3.1.1.2
Placards shall be affixed to the exterior surface of cargo transport units to provide a warning that thecontents of the unit are dangerous goods and present risks. Placards shallcorrespond to the primary risk of the goods contained in the cargo transportunit except that:
- placards are notrequired on cargo transport units carrying any quantity of explosives ofdivision 1.4, compatibility group S; and
- placards indicatingthe highest risk only need be affixed on cargo transport units carryingsubstances and articles of more than one division in class 1.
Placards shall bedisplayed on a background of contrasting colour, or shall have either a dottedor solid outer boundary line.（参考翻译：标语牌应以对比色为背景，或有点状或实心的外界线。）For dangerous goods of class 9 the placard shall correspond to the labelmodel No. 9 as in 5.2.2.2.2 ; label model No. 9A shall not be used forplacarding purposes.
也就是说，当有这种情况时，应有或虚或实的外边框。那么，问题来了，这个外边框应在什么位置呢？外边框的位置应在标牌内外边缘之间，具体什么位置IMDG CODE并没有详细规定。
划重点：
并不是所有的危险品标牌都需要有外框线！！！若危险品标牌与集装箱箱体没有鲜明的对比色，标牌才需要或虚或实的外框线。
来源：京检危化品安全培训