Is 4/0 or 6/4 a Koleston batch code?
No. Slash-form numbers are professional shade references.
Check Koleston Cosmetic Batch Code
Koleston is Wella's permanent hair-colour family, sold both as at-home colour kits and as Koleston Perfect professional colour cream. Shade identifiers such as 20 Black, 50 Light Brown, 0/11, 4/0 or 6/4 specify colour depth and tone. Developer percentages and mixing ratios also describe application—not production timing.
Koleston FAQ
Where is the code on a Koleston Perfect tube?
Check the sealed crimp and compare it with the carton end flaps.
Should I use the developer percentage?
No. A percentage such as 6% identifies developer strength.
Koleston codes on colour tubes, developer bottles and cartons
Before you rely on the decoded date
- Inspect the colour-cream tube at the crimp, the developer bottle at its base and back label, and the carton at both end flaps. In a home kit, gloves, conditioner and instruction leaflet may have unrelated supplier marks; prioritise the colour and developer components.
- Keep Koleston home shades separate from Koleston Perfect salon tubes and Welloxon developer. A slash-form shade, percentage such as 6%, volume number or barcode is a formulation/SKU reference; look for a separate stamped or inkjet string.
Common lookup mistakes
- Photograph all chemical components before mixing so a colour-tube mark is not attributed to the developer.
- Record the complete shade name separately from the batch; it helps identify the exact product but should not be entered as the code.
What to check next for Koleston
For Koleston, combine the decoded date with product type, PAO, storage, and seller context before deciding whether to open, keep, replace, or buy.
Understand what the checker can prove
See how Lot Date estimates production timing, where precision drops, and when official packaging should override the result.
Read methodologyMake sure you are reading the right string
Use a locating guide before retrying if the printed code is faint, split across the box and bottle, or easy to confuse with barcode data.
Open guide: How to Find Cosmetic Batch Codes and Lot Numbers on PackagingTurn the decoded date into a safer use decision
Use an expiry guide when production timing alone is not enough to decide whether to open, keep, or replace the product.
Open guide: How to Check Cosmetic Expiry Date from Batch Code, PAO, and PackagingCheck seller, storage, and authenticity signals
Use a risk guide when the item comes from marketplace stock, duty-free inventory, resale, or a seller you do not fully trust.
Open guide: Does a Batch Code Prove Authenticity? Can a Cosmetic Code Be Fake?Koleston lot, expiry, and packaging checks
Continue with the check that matches the product: find the lot number, review expiry or PAO, separate the batch code from the barcode, or assess sunscreen and fragrance more carefully.
Cosmetic Batch Code Lookup: Find the Right Code
Find the cosmetic batch code on your box, bottle or tube. Separate the lot from barcodes and shade numbers, then choose the brand to check production.
Cosmetic Batch Code Lookup: Find the Right CodeCosmetic Lot Number Search | Find a Lot Code by Brand
Find and copy the cosmetic lot number from your tube, jar or box. Keep kit components separate, then select the brand in Lot Date to check production.
Cosmetic Lot Number Search | Find a Lot Code by BrandCosmetic Expiration & Expiry Date Checker
Read a cosmetic expiration date or PAO symbol. Compare sunscreen, jelly and opened skincare labels, then check the batch code for production age.
Cosmetic Expiration & Expiry Date CheckerCosmetic Expiry Date from Batch Number
Enter a cosmetic batch number with its brand to check production age. Follow the result with product-specific expiry, unopened-life and PAO instructions.
Cosmetic Expiry Date from Batch NumberCompare related brands
Read next for this brand
- What to Do When the Batch Code Result Conflicts with Your Purchase Date
- How to Check Cosmetic Expiry Date from Batch Code, PAO, and Packaging
- How to Find Cosmetic Batch Codes and Lot Numbers on Packaging
- What If There Is No Batch Code on the Cosmetic Package?
- Cosmetic Production Date Meaning: MFG, Expiry & PAO
- Why a Cosmetic Batch Code Is Not Found — What to Check Next
- Why Your Batch Code Result Shows Only Year and Month
- Why the Box Code and Bottle Code Can Be Different
Track opened products in the app
Use the app to save results, manage opened dates, and avoid losing track of older backups.