Evesel Color Oxidizer Pieces

No. The colour cream alone contains inactive precursor molecules that produce no colour. Permanent hair dye requires the hydrogen peroxide in the developer to oxidise the precursors inside the hair cortex, converting them into large, permanent dye molecules. Without the developer, the cream will coat the hair surface but produce no lasting colour change. The two components must always be combined in the correct ratio immediately before application.

The smell comes primarily from the alkaline agent (ammonia or its substitute monoethanolamine) in the colour cream, which volatilises slightly when combined with the peroxide developer. This is normal and is a sign the chemistry is active. Ventilate the room during application - open a window or use a bathroom fan. The smell dissipates quickly after rinsing. Some people are more sensitive to the odour than others; if it causes headache or breathing discomfort, increase ventilation or apply the colour outdoors or in a well-ventilated space.

The oxidiser (developer) does two things. First, it helps the alkaline agent in the colour cream open the hair cuticle, allowing colour precursors to enter the cortex. Second, it triggers the oxidation reaction that converts the small, colourless precursor molecules inside the cortex into large, permanently bonded colour molecules. These are too large to exit the cuticle after the reaction is complete, which is why the colour is permanent. The peroxide also partially lightens natural melanin during this process, which is why even deposit-only shades can slightly lighten hair compared to its natural state.

The development time is when the dye chemistry completes inside the hair shaft. Rinsing too early (before 25-30 minutes) stops the reaction before the final colour molecules have fully formed - the result is paler, less vivid, and shorter-lasting than intended, with incomplete grey coverage. Leaving the colour on too long (beyond 60 minutes) does not improve the result and begins to over-process the cuticle, increasing dryness and potential breakage. The 30-45 minute window covers the full colour development cycle for most hair types.

Volume refers to the concentration of hydrogen peroxide in the developer. 20 vol (6%) is the standard for most EVESEL Gold shades - it lifts the natural colour one to two levels while depositing the new colour tone. The 12G Highlighter uses a higher-volume developer (30-40 vol equivalent) that lifts more aggressively for maximum lightening with less deposit. Using a higher volume than recommended for a standard shade does not improve colour results and increases damage and unpredictable lift.

The Control Line shades (TS Silver, GP Wine, AG Grey) use a different dye chemistry from the standard Gold shades. Control Line formulas contain direct dyes - pre-formed colour molecules - rather than the precursor-and-coupler system in the Gold range. Mixing the two types produces unpredictable and potentially muddy results because the direct dyes in the Control Line and the oxidative precursors in the Gold line do not interact as intended. Keep the two lines separate.

Rinsing removes the leftover colour cream, developer, and any surface residue. The post-colour conditioner restores some of the moisture and protein lost during the alkaline phase and begins to smooth and close the cuticle. Rinsing with cool water helps close the cuticle more firmly. For the 24 hours after rinsing, the dye molecules continue to oxidise slightly and the cuticle continues to settle - this is why colour can appear marginally different 24 hours after application versus immediately after rinsing.

Para-phenylenediamine (PPD) is the most common oxidative dye intermediate in permanent hair colour, including EVESEL Gold. It is the ingredient most often associated with hair dye allergies. PPD itself is colourless - it only develops colour when oxidised by the developer. Some people develop a sensitivity to PPD over time, which can cause contact dermatitis ranging from mild itching to severe swelling. A patch test 24-48 hours before each application detects PPD sensitivity before a full-head application. If you react, seek a PPD-free alternative.

Mixed leftover colour: flush down the drain with running water. Empty colour tube: rinse and recycle as plastic where accepted. Developer bottle: rinse with water to dilute any residual peroxide, then recycle as plastic. Gloves and conditioner sachet: dispose of in general household waste. Do not put undiluted mixed colour into the bin - it stains and should not be landfilled as a liquid.

EVESEL Gold Hair Color uses an alkaline agent as part of its permanent colour chemistry. Whether this is traditional ammonia or a low-odour substitute like monoethanolamine (MEA) varies by formulation version. Check the ingredient list on the specific product package for "Ammonium Hydroxide" (ammonia) or "Ethanolamine" (MEA). Both serve the same cuticle-opening function; MEA has a less pungent odour. Ammonia-free claims in this context typically mean MEA or another substitute has replaced traditional ammonia - the chemistry is equivalent, just less sharp-smelling.

Yes. Previously coloured hair already contains artificial dye molecules in the cortex. Applying a new permanent colour on top layers new molecules over the existing ones, which can shift the tone in unpredictable directions - particularly if going from a darker dyed colour to a lighter target shade. Darkening is generally predictable; lightening over existing colour is not. EVESEL Gold will lift natural melanin during development but cannot remove previously deposited artificial dye. If you need to significantly lighten already-coloured hair, a professional colour correction service or colour remover is needed before the new dye application.