Gemtoy Black 3-in-1 Hair Dye Shampoo, 500 ml

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Product guide

Gemtoy Black 3-in-1 Hair Dye Shampoo, 500 ml

Gemtoy Black 3-in-1 Hair Dye Shampoo is a liquid colour shampoo sold in a 500 ml bottle. The listing describes it as a home-use option for black colour and grey coverage, with a leave-on time of 10–15 minutes or 20–25 minutes for its stated best results.

At a glance

Described as a 3-in-1 product for colouring, shampooing and conditioning.
The instructions say to apply it to dry hair, distribute evenly and leave it on for 10–15 minutes, or 20–25 minutes for best results.
The listing claims the 500 ml bottle can be used about 10 times and that colour lasts 4–5 weeks.

Price

$16.99Save 15%

Reference price: ~~$19.99~~

Price checked: 12 Nov 2026

View offer Ahead of Black FridayExplore the selection

Often bought together

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Pros and cons

Pros

Combines hair colour, shampoo and conditioner functions according to the listing.
The 500 ml bottle and claimed approximate 10 uses may suit repeat at-home applications.
Use is presented as a straightforward apply-and-wait routine, with no salon visit specified.

Technical specifications

15 specifications

Identity
Brand	Gemtoy

Format and colour
Item form	Liquid
Colour	Black
Container type	Bottle
Hair type	All
Suitable hair colour	All Hair Colors
Hair colour permanence	Demi-Permanent
Package size	500ml
Number of items	1

Use and formulation claims
Recommended uses	Gray hair coverage, beard coverage, instant hair coloring, home hair dyeing
Product benefits	Natural & Long Lasting Color Protection
Material features	Paraben Free
Material type free	Herbicide Free
Full cure time	25 Minutes

Package dimensions
Dimensions and weight	25.6 x 11.7 x 7.9 cm; 560 Grams

What to know before buying

Listing details to confirm

Timing claims vary: the listing mentions colouring in 5–10 minutes and 10–15 minutes, while its directions say 10–15 minutes and 20–25 minutes for best results. It also describes colour as lasting 4–5 weeks and elsewhere as weeks or months. Treat these as claims, not guaranteed outcomes. Perform the advised skin test before first use, wear gloves and consider using conditioner if hair is relatively dry. Customer reports of coverage and dryness are mixed.

Who is it for?

A good fit for

People seeking a black, demi-permanent shampoo-style colour for at-home grey coverage.
Buyers who want one product described as colour, shampoo and conditioner.
Those considering colour application to hair or a beard, as named in the recommended uses.

Less suited to

Anyone who needs reliably complete grey coverage or a predictable colour result, given mixed customer feedback.
Anyone unwilling to do a skin test or follow the listed glove and application instructions.
Buyers seeking a clearly consistent application time or colour-duration estimate.

Gemtoy Black 3-in-1 Hair Dye Shampoo, 500 ml · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.2 / 5 · 341 ratings

5 stars70%70%
4 stars9%9%
3 stars8%8%
2 stars3%3%
1 star10%10%

Customer feedback highlights ease of use and fast application, with some reports that colour lasts for weeks or longer. Grey coverage and value opinions vary, and reports of hair feel range from soft to very dry. These experiences matter because the product is advertised for quick black grey coverage and combines shampoo and conditioner functions, but those claims do not ensure consistent coverage or moisturising results. Aggregate ratings are generally favourable but include a notable low-rating share, and ratings alone do not explain the reasons.

Positive themes

Customers describe the product as easy to use and fast-acting.
Some customers report colour lasting for weeks or longer.

Mixed feedback

Reports of grey coverage range from a satisfactory neutral black to little or no visible colour.
Opinions on value for money differ.
Some customers report soft hair, while others say their hair became very dry.

Frequently asked questions

How long should the colour be left on?

The directions say 10–15 minutes, or 20–25 minutes for best results. Other listing text gives different timings, so follow the package directions for the selected product.

How long does the colour last?

The listing claims 4–5 weeks in one place and describes weeks or months elsewhere. Customer feedback includes reports of lasting colour, but the result is not consistent enough to promise a duration.

What do customers report about grey coverage?

Feedback is mixed. Some customers report a neutral black result, while others say they saw no colour. The listing’s grey-coverage claim does not ensure the same result for every user.

Is a skin test recommended?

Yes. The use instructions specifically advise a skin test before first use and say to wear gloves during application.