Most likely Wella code locations
For Wella, start with the box bottom. If the outer box is missing, move to the product base and then the package seam.
Check the label around each marking to distinguish the production lot from product references; position and character count alone do not identify a lot.
- Check the box bottom under bright side light.
- Check the product base under bright side light.
- Check the package seam under bright side light.
Numbers to ignore
Do not enter the retail EAN/UPC product number, shade number, SKU, ingredient registration number, or volume marking as the batch. Some scannable codes contain additional fields; use only an explicitly identified lot field, not the entire scan.
If several Wella codes appear, identify the production lot from its label and the instructions for that product. Length alone cannot identify it. Keep every mark with its original location and never trim a longer identifier to make it fit.
When the print is hard to read
Embossed or low-contrast batch codes are easier to read with side lighting. Take a photo, zoom in, and preserve leading zeroes, separators, and letter case.
If the box and container disagree, check whether one string is a product reference. Preserve both markings separately while confirming their purpose.
Wella product and package context
A color shade code, developer volume, mixing ratio, and product family such as Koleston Perfect, Color Touch, or Blondor are not manufacturing lots. Check the tube crimp, bottle, tub, sachet, or carton for a separate production marking.
Oxidative color and lightener should be mixed and used only as the professional label directs. An opened shampoo or mask is instead judged through PAO, closure hygiene, odor, texture, and any contamination from shower water.