Since its release in 2019, Green Flash The regulation is pre-empted and excludes HEMA and DI-HEMA-TMHDC molecules from its formulation, which are now banned from sale to individuals.
HEMA? What is it?
They are called: diHEMA monomers and di-HEMA-TMHDC oligomers. Under these enigmatic names hide two small molecules present in many traditional semi-permanent. These substances have the property of agglutinate each other under light (UV, LED) to form a hardening film and allow the holding of the semi-permanent varnishes.
What are the risks?
The problem is that these molecules, belonging to the chemical family of (methyl)acrylates are also Very small, very reactive and volatile, these molecules can penetrate the skin and cause severe skin reactions. allergic and inflammatory. The spills d'ongle during poses then become rather risky...As for the deposit, with this type of molecules, it requires the use of d'acetone and abrasive sanding of nails.
Special features of HEMA and DI-HEMA TMHLDC substances
- Molecules sensitizing direct contact with the skin (allergic dermatitis)
- Very small molecules, high responsiveness, ability to enter the epidermis = skin disorders.
- Volatile = risk of inhalation and irritation of the respiratory mucosa, asthma.
- Withdrawal requiring use acetone and abrasive sanding for nails.

What does the law say?
Since September 2021, the new European Regulation* prohibits the sale of manicure products containing these two molecules to individuals. Now only care professionals are empowered to handle these products in institutes and encouraged to take many precautions (spiring table, filter mask and nitrile gloves).
What the regulations say
European?Since September 2021, semi-permanent nail and varnish gel products containing HEMA and DI-HEMA-TMHCC substances are:
- Prohibited for sale to individuals
- Authorized under conditions on sale to professionals
Products distributed to professionals should display the following statement: "Only for professionals - may cause an allergic reaction"
Green Flash : the 0% alternative of risk, 100% compliant with the regulations.
From its release in 2019, innovation Green Flash The Commission's proposal for a new generation of nail polish Long-lasting LED cleaner, greener and non-sensitizing.
The fruit of a long research effort, Green Flash by Manucurist is in compliance with the regulations, authorized for sale to the general public and above all does not contain monomers of (Methyl)acrylates with sensitizing potential. To replace them, we use copolymers whose barbaric name - Bis-HEMA Poly(1,4-Butanediol)-9/IPDI Copolymer - can lead to confusion.
Don't panic! We explain why our products are not sensitizers.
Chemically speaking, our copolymers consist of an assembly of 3 molecules each with a different composition. Unlike monomers of (methyl)acrylates,
"As I am allergic to conventional gels and semi-permanents, I turned to products Green flash - I'm not. I am so satisfied with the result, I have no allergic reactions! I recommend 200%. » Louise P
"I tried so much semi-permanent varnish and all of them triggered allergies. Today I finally found a natural semi-permanent varnish that holds! No more allergies and nails are damaged. The dropoff is so simple! » Elise B
Green Flash , the uncompromising alternative on the holding and shine
However, their efficiency remains the same: thanks to the passage under LED lamp, copolymers bind together to form a network of polymers that solidifies the varnish layer and gives it a long hold.
Green Flash by Manucurist is therefore also an uncompromising alternative on the outfit and shine. In just 3 easy and fast steps, the manicure is impeccable up to 10 days. To find all the essentials of this routine, you can start with a semi-permanent varnish kit Green Flash™. And above all, it retreats like a varnish using a soft solvent without acetone, without damaging the nails.
Green FlashTM by Manucurist
- Not sensitizing
- Compliant with European regulations
- Authorized for sale to individuals
- Without monomers of (methyl)acrylates
- Gently withdraws without acetone
- Shine and hold for up to 10 days.
Discover innovation Green Flash and what he has more than the others
Awareness and Allergies: Beware of what you put on your nails

