Mind the ‘light fastness’ symbol
This symbol means that the carpet was tested to determine if the colours stay fast. Carpets that have been subjected to this test and comply with the appropriate standards bear this ‘light fastness’ symbol. Discolouration will not quickly occur in these carpets. They are also known as UV-resistant carpets.
In North-West Europe we can assume that discolouration practically never occurs. With the limited number of hours of sun in our climate there is little or no danger of carpet discolouration.
Don’t let the pile fool you
Do you think you nevertheless notice discolouration? Don't be mistaken: sometimes it just seems that way. There are carpets with some parts appearing lighter than others. A carpet can appear to be another colour depending on how you look at it. This is because the piles are not standing fully upright. The colour of the piles is always darker on top than on the side of the piles. If you move your hand over the carpet in a certain direction you can see this colour difference. This is an intrinsic characteristic of a carpet and has nothing to do with discolouration.