Long-wear nail polishes (the type that cure naturally in daylight and are removed with standard polish remover) generally do not contain the same types or concentrations of reactive acrylate monomers that are responsible for most gel or builder-product allergies.

Key points:

• Traditional and long-wear nail polishes are usually based on film-forming resins, plasticizers, and solvents — not uncured acrylate monomers.
• Gel systems (UV/LED-cured or hard gels) rely on acrylate and methacrylate monomers that polymerise under light. Incompletely cured material or skin contact with the uncured product can trigger allergies.
• Because long-wear polishes are not true gels and are designed to air- or daylight-cure at a much lower reactivity, they present a far lower risk of acrylate sensitisation.

That said, some brands may use small amounts of acrylate-based ingredients in the formulation to enhance adhesion or flexibility, so the risk is not zero, but it’s extremely low compared to gel systems, especially when used correctly.

As always, anyone with a known acrylate allergy should check ingredient lists (look for terms ending in -acrylate or -methacrylate) and perform a patch test or consultation before use.

💬 Educational summary:
Long-wear nail polishes are not known to be a significant source of acrylate allergies. Their chemistry differs fundamentally from gel and builder products, which are the main culprits for sensitisation reactions.

The post Can long-wear nail polishes cause acrylate allergies like gel nails do? appeared first on NailKnowledge.

To answer this question, we consulted our in-house expert in cosmetic ingredients and nail product safety. Here’s what you need to know about BPMMA, its connection to PMMA, and the potential safety concerns when using these materials in press-on nails.

Understanding BPMMA: A Derivative of PMMA in Nail Products

BPMMA likely refers to **Butyl Poly(methyl methacrylate)** or a similar derivative of Poly(methyl methacrylate) (PMMA). PMMA is a common acrylic resin used in many products, including nail enhancements and press-ons. BPMMA would be a modified version of this, where the “B” could stand for butyl or another chemical variation added to adjust its properties, like flexibility or adhesion.

While PMMA is widely used in the beauty industry, safety concerns arise when it’s used improperly (e.g., in unregulated formulations) due to the potential for allergic reactions or skin irritation. BPMMA might be less common, so if it’s a derivative, its safety would depend on its formulation and concentration in the product.

To ensure safety, it’s essential to check with regulatory agencies or product guidelines, like those from the FDA or the EU’s Cosmetics Regulation, which set standards for safe cosmetic ingredients.

The post Is BPMMA Safe for Press-On Nails? appeared first on NailKnowledge.

Q: Does Tea Tree Oil, or melaleuca oil, absorb through the nail all the way down to the nail bed?

Tea Tree Oil: Nail Absorption and Safe Usage

Tea tree oil, also known as melaleuca oil, can be absorbed through the nail and penetrate down to the nail bed over time. However, it’s important to exercise caution when using this essential oil. Tea tree oil is a commonly used remedy for various skin conditions and is found in cosmetics, topical medications, and household products.

Understanding Allergic Reactions to Tea Tree Oil: A Closer Look

It’s worth noting that tea tree oil has been associated with a higher incidence of allergic reactions compared to other essential oils. The first reported cases of allergic reactions to tea tree oil date back to 1991. In routine testing, positive patch test reactions have been observed in a range of 0.1% to 3.5% of cases. Additionally, there have been reports of approximately 100 allergic patients in various case reports and case series.

If you’re looking for alternatives that are less likely to cause allergies, there are several oils available in the market, such as olive oil, avocado oil, coconut oil, jojoba oil, and apricot oil. However, individuals with nut allergies should exercise caution when using almond oil.

When purchasing oils, it’s essential to buy products only from reputable manufacturers and carefully read the labels to ensure that they do not contain any harmful additives.

The post Tea tree oil, does it absorb through the nail? appeared first on NailKnowledge.

Fungal Risks in Base Gel and Normal Gel

First we need to understand the difference between a rubber base and a regular base coat, so we can assess if there is any extra chances of it allowing pathogens near the nail plate.

A rubber base coat (despite its lack of actual rubber) is primarily a stronger and more viscous base coat that provides additional strength to flexible and weak nails. Due to its increased flexibility compared to other strong bases and builder gels, it can better adapt to the nail, reducing the risk of snapping when subjected to pressure.

It’s simply a prescriptive base coat – another tool at the nail professional’s disposal, and because it doesn’t differ that much from other forms of coatings, rubber base gel is generally not more prone to fungus and infections compared to regular gel.

Both types of gel nail products provide a protective layer over the natural nail, which can help prevent moisture and bacteria from entering the nail bed and causing infections. However, it’s important to note that the risk of fungus or infections primarily depends on how the nails are prepared, applied, and maintained, rather than the specific type of gel used.

Here are a Few Key Points to Consider:

1. Proper Nail Preparation: Regardless of the gel type used, proper nail preparation is essential. Thoroughly cleanse and sanitise the nails before application to remove any bacteria or fungi present on the nail surface. Onycholysis can occur if the natural nail is buffed too much so that it is thin. It can also occur from Covid or other systemic illnesses.

2. Hygienic Practices: Follow strict hygiene protocols during the application process. Use sanitised/disinfected tools, disposable applicators, and avoid cross-contamination between clients. This helps minimize the risk of introducing harmful microorganisms.

3. Application Technique: Apply gel products according to the manufacturer’s instructions. Ensure that the gel is applied evenly and properly cured using a suitable UV or LED lamp. Incomplete curing can create an environment conducive to bacterial or fungal growth. There should be no heat experienced while under the lamp. This could indicate the product is applied too thickly or the lamp does not match the product brand.

4. Maintenance and Aftercare: Educate clients on proper maintenance and aftercare practices. Encourage them to avoid prolonged exposure to water, use gloves when working with harsh chemicals or cleaning agents, and regularly moisturize the cuticles and nails. These measures can help maintain the integrity of the gel coating and reduce the risk of infections. The use of oil several times daily is strongly recommended.

5. Client Communication: Establish open communication with clients to address any concerns they may have regarding nail health or possible infections. Encourage them to seek professional advice if they notice any signs of infection, such as redness, swelling, pain, or unusual nail changes.

6. During an Infill: While performing an infill, it is crucial to meticulously eliminate any areas of lifting, as even the smallest ones can create a favorable warm and damp environment for bacteria and fungi to thrive

Maintaining Nail Health

By following these guidelines and practicing good hygiene, both rubber base gel and regular gel can provide a protective and durable coating for the nails, minimizing the risk of fungal or bacterial infections. Remember, maintaining overall nail health and practicing proper hygiene are key factors in preventing any potential nail problems.

The post Is rubber base gel more prone to fungus and infections than your normal gel? appeared first on NailKnowledge.

Question:

I read recently that if you cure properly you will not have a reaction. Does this mean a person who has an allergic reaction (nail lifting) who is now healed can once again try gel polish ensuring they cure it properly?

Answer:

The problem is that some products have such a high % of allergens it is impossible to properly cure and the allergens can leech out!

The product is still in contact with the nail plate and, if not properly cured, can leach out through the nail plate,

If you are curing a UV cured gel through a press on nail, then double cure as the nail can inhibit the effect of the UV energy by 20%.

There is no simple answer for those with an allergy!

The only one answer for them is to have a dermatological patch test to see exactly which ingredient they are allergic to and then avoid it, for life.

Press on nails could be used if they are adhered using an adhesive that does not contain their allergen. Many nail products contain the same ingredients so this is a gamble!

Be sure to read this interesting article where we discuss press on nails as being an good alternative.

The post Press on nails, allergic reaction healed, can I try gel again? appeared first on NailKnowledge.

Question:

Hi, I’m concerned by the amount of information I’m seeing regarding allergies to acrylates and the risks that a client could develop an issue as a result of my work. Can you tell me if some of the newer products on the market, which claim to be free from many known trigger ingredients are a safer option when choosing a professional brand?  Is there such a thing as a safe gel manicure?

Answer:

Read these blogs which explain the articles you are referring to.

UV Nail Lamps Under Atatcks Again
Don’t Take Any Notice of Click Bait Stories

One of the most common allergens is HEMA (hydroxy ethyl methacrylate) but there are plenty of others that anyone can react to.

HEMA free helps slightly but not if someone has already reacted as they can be allergic to many of the other ingredients.

The safest products are those that are used correctly and properly cured with a matching UV lamp and the correct amount of time under the lamp.

The post Is there such a thing as a safe gel manicure? appeared first on NailKnowledge.

Question:

If a client has lotion or sunscreen on prior to their service. Can the client have service breakdown issues? I also heard techs say that proper prep should eliminate the lotion or sunscreen completely.

Answer:

When a client enters the salon, they should first wash their hands with soap and water, this will remove most dirt and oils and more importantly, pathogens that could cause a problem if they get trapped between the nail product and the nail plate.

If you remove the cuticle with a good quality oil your client will then have to wash their hands again with soap and water. Prep the nail plate as required for the service and you should have no problems at all.

Sometimes a brand will instruct you to remove the shine from the nail plate, instead of doing that with a file, scrub the nail plate well with a good quality cleanser, fold your lint free pad once in the length and again in the width into the shape of a nail and scrub well and you should have no problems at all.

After the service, wash the hands again with soap and water then replenish the skin with a good oil and lotion & sunscreen as required.

Check out the series we did below on product lifting – and check with an educator of the brand you are using to make sure you are following all the steps necessary to provide a good nail service with the longevity expected.

The post Wearing sunscreen, can this lead to service breakdown? appeared first on NailKnowledge.

Question:

My client had a skin reaction after the product was removed. Could it be the actual UV gel is breaking down and that is what the client is reacting too instead of the remover?

Answer:

Yes I agree, this reaction is NOT caused by acetone. How can I say this so assuredly? Contrary to what some may believe acetone does not cause skin allergies and clients don’t become allergic to acetone. Acetone can dry the skin and may cause skin irritation, but that’s much different from an allergic reaction. Salt can dry and irritate skin as well, but your body doesn’t become allergic to salt either. This skin reaction is most likely caused by uncured monomers or oligomers being released into the solvent when the nail coating breaks apart. Some nail professionals only cure their UV gel nails to 70% or less, which leaves a lot of unreacted ingredients inside the hardened nail enhancement. The same is true for UV gel polishes.

When any nail coating is NOT properly cured, the solvent may dissolve uncured ingredients and then may help let these same ingredients slip past the skin’s outer surface barrier. Once inside the skin, certain specific substances can confuse the immune system and cause it to create an allergic skin reaction. But the solvent isn’t the problem, the dissolved substances which are called the “solute”, are what causes the allergy or skin irritation. That is why allergic skin reactions are much more likely to occur when the nail coatings are not properly cured and are much less likely when nail coatings are properly cured. So, the first thing I would do is focus on ensuring a proper cure. Ask yourself, is the correct nail lamp being used and as used directed? Are the UV bulbs cleaned and replaced regularly? Is the product too thickly applied? Are the directions for use being followed and all instructions and warnings being heeded? 

The post What causes the skin reaction after the nail product is removed? appeared first on NailKnowledge.

Query:

I have seen lots of clients coming into the salon and having Onycholysis on their nails or toenails due to trauma recently. I tried to explain the risk of having nail coating over but it seems like only 30% of them would understand the problem. Others said, “it has been like that for years and it never got better. I am giving you permission to do them”. What would be the best way to explain to clients that it is unsafe to do so, so that our conversation doesn’t turn into an argument.

Answer:

I find it hard to believe it has been there for years! It just doesn’t work like that and they obviously never use oil.

However, I would explain something like this:-

The nail needs a full attachment to be strong. A partial attachment makes it weak. It may not feel heavy but a UV gel polish will be too much weight for the nail and the tiniest accident could rip the nail off the nail bed so it’s not worth the risk as it will take months to grow back. Use oil daily and it will reattach.

The post Is it safe to apply a coating over Onycholysis? appeared first on NailKnowledge.