It s called dye lot variation and it s quite common.
Carpet dye lot variation on stairs.
Bleach spots create areas of yellow white or a much lighter version of the original dye on the carpet which can detract from the beauty of the room.
Technically bleach does not stain a carpet.
The color difference can vary from being barely noticeable to glaringly off color.
The manufacturer recommends how to orient the tiles.
This is because in addition to having to decide on carpet style and color the carpet has to be of appropriate durability and thickness to be installed on the stair.
James most carpet manufacturers find that a given production can be within 10 heavier in shade than the manufacturer s standard and another production run of that same style color carpet be within 10 lighter in shade than the manufacturer s standard and both still be well within the acceptable range of dye lot variation even if the actual difference in shade between the two productions.
Carpet tiles will have arrows on the back that indicate the direction of the carpet pile.
A dye lot is a record taken during the dyeing of yarn to identify yarn that received its coloration in the same vat at the same time.
Slight differences in temperature dyeing time and other factors can result in different shades of the same color between different dye lots of.
Yarn manufacturers assign each lot a unique identification number and stamp it on the label before shipping.
Mix carpet tiles from different packs to account for dye lot variations.
Instead it strips the dye out of the carpet fibers leaving a mark.
Stairs are the most common place in the home to have carpet and yet they are also the trickiest.