Box Dye Ingredient Lists: How to Compare Two Formula Versions by Market

Two boxes of hair colour can show different ingredient lists even when the shade name looks identical. A changed position is a clue to investigate, not proof of a reformulation. First establish that the products are genuinely comparable: same shade, same component (colour cream versus developer), same market, same package version and a readable label.

Why a list can differ

• The formula may have changed, or the products may be regional variants.
• The two photographs may show different kit components, shades, package sizes or label revisions.
• Ingredient names, translations, grouped ingredients and jurisdiction-specific declarations may differ.
• Ingredient order can be affected by local labeling exceptions, so position alone does not reveal concentration.

Compare like with like

1. Record the product identity. Note brand, exact shade/number, permanent or demi-permanent type, kit component, market, lot code and any version/date printed on the pack.
2. Photograph the complete panel. Capture the full ingredient list on each component, including footnotes and colourant declarations. Do not combine colour cream and developer into one list.
3. Transcribe without normalizing. Keep spelling, order, parenthetical terms and translated names as printed. Mark uncertain or unreadable text instead of guessing.
4. Align names cautiously. Similar-looking names may have different functions or identifiers; a name match does not prove same grade, purity or amount. Use an authoritative ingredient identity source when needed.
5. Separate observations from explanations. “Ingredient X appears in one printed list but not the other” is an observation. “The manufacturer removed X in this date” requires confirmation tied to the exact shade, market and lot/version.
6. Ask the manufacturer a narrow question. Send the shade, market, lot code, component and clear package images; request the applicable formulation or label revision and effective production range.

What U.S. and EU rules tell us

In the United States, cosmetic ingredients are generally declared in descending order of predominance, but ingredients at 1% or less may follow in any order after ingredients above 1%; colour additives have a separate ordering exception. EU Regulation 1223/2009 similarly permits ingredients below 1% to be listed in any order after ingredients at higher concentration, with a specific exception for colourants intended to colour hair. These are jurisdiction-specific labeling rules, not a universal formula decoder.

As a result, moving an ingredient lower in a list does not tell you how much its concentration changed. Nor does absence from a label photo prove absence from the formula: the panel may be incomplete, another kit component may carry the declaration, or the market’s rules may differ.

Ingredient comparison is not an allergy assessment

A side-by-side list can help identify text differences, but it cannot determine personal safety, predict a reaction or replace the product’s warning and use directions. Follow the specific manufacturer instructions. If you have a prior reaction or a health concern, consult a qualified clinician; do not use a crowdsourced ingredient comparison as clearance to apply a product.

Official references and limits

U.S. FDA, Summary of Cosmetic Labeling Requirements; Cosmetics Labeling Guide. European Union, Regulation (EC) No 1223/2009, Article 19.

This guide explains how to compare public label information. No specific manufacturer formula, production lot or hair-colour product has been independently tested for this article.