Discovery is Inochroma’s learning hub for people exploring grey hair care with sensitive scalps. If you’ve experienced irritation from traditional dyes, feel unsure about labels like PPD-free or ammonia-free, or want natural-looking results without harsh regrowth lines, this is where clarity starts.

Our guides explain how grey hair behaves differently, why some colour systems cause discomfort, and how approaches like grey blending, no-mix colour, and low-maintenance routines can reduce stress on the scalp. Each article is written to help you decide what works for you — before you commit to any routine.

Explore dermatologist-style patch tests, PPD-free and ammonia-free routines, and no-mix grey blending.

FAQ

Is PPD-free right for me? Start with a 24-hour patch test; if you’ve reacted to oxidative dyes before, PPD-free/no-mix systems can reduce irritation risk.

How often? Weekly touch-ups keep tone even while fade stays soft with no harsh demarcation lines.

Discovery

No-Mix vs Mix-at-Use Hair Color: Chemistry, Com...

A technical yet readable comparison of no-mix and mix-at-use hair color. Understand chemistry, scalp comfort, timing, and when each method makes sense.

No-Mix vs Mix-at-Use Hair Color: Chemistry, Com...

A technical yet readable comparison of no-mix and mix-at-use hair color. Understand chemistry, scalp comfort, timing, and when each method makes sense.

Grey Blending vs Full Coverage: Pick the Right ...

Two different paths for grey hair: blending or full coverage. Compare comfort, upkeep, and results—plus tips for sensitive scalps and natural-looking shade choices.

Grey Blending vs Full Coverage: Pick the Right ...

Two different paths for grey hair: blending or full coverage. Compare comfort, upkeep, and results—plus tips for sensitive scalps and natural-looking shade choices.

The 10-Minute Gray Hair Routine: Natural Root T...

A step-by-step plan for soft, natural grays. Learn quick root touch-ups, weekly maintenance, and fade control with deposit-only, no-mix formulas.

The 10-Minute Gray Hair Routine: Natural Root T...

A step-by-step plan for soft, natural grays. Learn quick root touch-ups, weekly maintenance, and fade control with deposit-only, no-mix formulas.

Ammonia-Free vs PPD-Free vs Fragrance-Free: Wha...

What do “ammonia-free,” “PPD-free,” and “fragrance-free” really mean? A clear, dermatologist-style guide for sensitive scalps—with choosing tips and patch-test advice.

Ammonia-Free vs PPD-Free vs Fragrance-Free: Wha...

What do “ammonia-free,” “PPD-free,” and “fragrance-free” really mean? A clear, dermatologist-style guide for sensitive scalps—with choosing tips and patch-test advice.

Dermatologist-style Patch Test & Strand Test

Dermatologist-style patch test and quick strand test for PPD-free, ammonia-free, no-mix dyes. Step-by-step, timing, result checks, and sensitive-scalp tips.

Dermatologist-style Patch Test & Strand Test

Dermatologist-style patch test and quick strand test for PPD-free, ammonia-free, no-mix dyes. Step-by-step, timing, result checks, and sensitive-scalp tips.

A Gentle Guide to Natural-Looking Gray Blending

PPD-free hair dye in Canada, explained. Compare no-mix and ammonia-free options for sensitive scalps, learn gray blending vs coverage, shade tips and 24-hour patch-test steps.

A Gentle Guide to Natural-Looking Gray Blending

PPD-free hair dye in Canada, explained. Compare no-mix and ammonia-free options for sensitive scalps, learn gray blending vs coverage, shade tips and 24-hour patch-test steps.