A triangle with two diagonal lines inside or a triangle with CL inside and a cross through - both of these symbols indicate that you should use non-chlorine bleach. Salah Sun, Head of Product ...

Triangle GHI is the same as ABC but has been rotated 90° anticlockwise. Triangle DEF is a different size. Image caption, Line segments AB and GH are the same length. BC and HI are the same length.

But many people would not be able to tell you what the triangle symbol on a clothes label means, even though you've probably got it on hundreds of items of clothing. The white triangle on clothes ...