Carpets are produced in batches – known as creels – and usually each batch produces between 500m2 – 3000m2 in a single width, depending on the creel size. Whilst the recipe used by the dyer remains constant, and is followed to the letter, in each separate production the colour reproduction will vary from batch to batch. However production is matched back to the original or master sample to ensure that the colour remains ‘within a commercial tolerance’.
This process if not an exact science and a commercial tolerance is subjective but nevertheless is usually the professional judgement of the head dyer based on his/her experience.
A greater level of tolerance is required on blended colours (Heathers etc). To ensure perfect colour matching it is advisable that a single width be used in any installation requiring exact colour matching.
N.B. Carpets which are laid with the pile travelling in different directions, even though they be from the same batch will appear not to match. For further information please check with the manufacturers recommendations.