
Nail files are used to gently grind down and shape the edges of nails. They are often used in manicures and pedicures after nails have been trimmed. There are many different types of nail files, such as emery boards, glass, crystal, and metal files. The numbers on nail files refer to the coarseness of the grit on the nail file surface, with lower numbers indicating a more abrasive file. The shape of the nail file also determines its function, with straight files being used to straighten the side walls and the tip of the nail, and oval files being used for the bottom area of the nail, around the cuticle.
| Characteristics | Values |
|---|---|
| Purpose | To gently grind down and shape the edges of nails |
| Types | Emery boards, ceramic, glass, crystal, plain metal files, or metal files coated with corundum |
| Grit | The abrasiveness or smoothness of a file, ranging from 60 to 12,000 |
| Grit Types | Coarse (100-150 grit), Fine (240-400 grit), Buffers (1000-4000 grit) |
| Filing Technique | File in single strokes along the grain of the nail, from the outside edge to the midline |
| Shapes | Almond, Round, Square, Coffin, Stiletto, Squoval |
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What You'll Learn
- Emery boards are abrasive, flexible, and inexpensive
- Glass nail files are gentle on nails and easy to clean
- Grit numbers refer to the abrasiveness or smoothness of a file
- Filing technique: file from the outside edge to the midline in one direction
- Filing technique: hold the file perpendicular to the edge of the nail

Emery boards are abrasive, flexible, and inexpensive
The abrasiveness of an nail file is determined by its grit number. The grit number refers to the size of each grain of sand or the bump particles on the surface of the file, with the number indicating how many grains fit into one square inch. A lower grit number means the file is more abrasive, while a higher grit number means the file is smoother. Emery boards typically have a grit number ranging from 100 to 4000, with the lower end of this range being more abrasive and suitable for shaping artificial nails or gel extensions. Fine-grit emery boards, with a higher grit number, are better suited for natural nails as they are softer and less likely to damage the nail.
Emery boards are also flexible, which is an important feature in a nail file. The flexibility of the board determines how much energy is transferred from your hand to the area between the file and the nail plate. A softer core will absorb and even out the energy transferred, resulting in a high shine on the nail. This process is called buffing, and it is achieved with a thick, soft, and spongy file. The flexibility of the emery board allows for gentle polishing of the nail, making it a versatile tool for achieving a smooth and shiny finish.
In addition to their functionality, emery boards are also known for their affordability and disposability. Their inexpensive nature makes them a sanitary alternative to metal nail files, as they can be economically disposed of after each use, ensuring hygiene and reducing the risk of infection. This feature is particularly valuable in professional settings, such as manicure and pedicure services, where single-use tools are preferred to maintain sanitation standards.
Emery boards are widely accessible and commonly used for nail care at home and in professional settings. They are a popular choice due to their effectiveness, flexibility, and affordability, making them a convenient and reliable tool for maintaining and shaping nails.
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Glass nail files are gentle on nails and easy to clean
Glass nail files are a great tool for nail care. They are made from tempered glass and have a precise filing surface that seals the keratin layers at the edge of the nail, helping to prevent splitting and peeling. This style of file’s precision performance helps get you healthier, stronger nails with a sleek, smooth finish.
Glass nail files are also known for their durability. They are made of a tough material that does not need to be replaced as often as emery boards. With proper care and cleaning, a high-quality glass nail file can last for years. This makes them a more sustainable choice for both personal and professional use.
The grit on glass nail files is super finely sanded down, which creates a clean, smooth, and "sealed" edge on your nails. This prevents the jagged, torn edges that can be caused by traditional emery boards, and results in less peeling and chipping. Glass nail files are therefore gentler on nails and can be used on natural, acrylic, and gel nails.
Glass nail files are also easy to clean and sanitise. They can be washed in warm water with soap and a soft brush, or sprayed with isopropyl alcohol to kill any germs and bacteria. They should then be dried with a clean towel and stored in their original sleeve to prevent breakage.
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Grit numbers refer to the abrasiveness or smoothness of a file
Nail files are tools used to gently grind down and shape the edges of nails. They are often used in manicures and pedicures after the nail has been trimmed. Nail files come in various materials, including emery boards, glass, crystal, ceramic, and metal. Emery boards, for example, are abrasive and flexible, making them suitable for shaping and smoothing nails.
Grit numbers refer to the abrasiveness or smoothness of a nail file. The grit number indicates the amount of bumpy particles in a square inch of the file. Lower grit numbers denote a more abrasive file, while higher grit numbers indicate a smoother file. For instance, a file with a grit of 60 will be coarser than a file with a grit of 12,000. Coarse files typically range from 100 to 150 grit and are suitable for filing, lengthening, or shaping acrylic or gel nails.
When choosing a nail file, it is important to consider the purpose of filing to avoid damaging your nails. For example, when removing gel nails, a medium grit of 100/180 is recommended to prevent damaging the natural nail. A 180-grit file is suitable for shaping the natural nail edge, while a 240-grit file may be preferred for softer or damaged nails.
Buffers, which are thick, soft, and spongy files, are used to add shine to acrylic or natural nails. The grit numbers on buffers also correspond to their function. For instance, a 100/180 buffer is used first, followed by a 220/280 buffer to eliminate scratches and ridges, and finally, a 600/4000 buffer to bring out the shine.
The shape of the nail file also influences its function. Straight files are suitable for filing the free edge, sidewalls, and lower arch of the nail, while oval files are ideal for the bottom area around the cuticle.
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Filing technique: file from the outside edge to the midline in one direction
Filing your nails can help you maintain a neat and tidy appearance, but it's important to do it correctly to avoid damaging your nails or causing discomfort. Here's a step-by-step guide to filing your nails effectively and safely:
When using a nail file, it's important to follow the correct technique to achieve the best results and avoid damaging your nails. Hold the file firmly but comfortably in your dominant hand, positioning your thumb and index finger at the ends for better control. Start by identifying the direction of your nail growth. Nails typically grow from the cuticle to the free edge. You want to file in one direction, from the outside edge towards the center of the nail, following the natural growth pattern. This helps prevent splitting and weakening of the nail.
Gently place the file under the nail edge at a slight angle, ensuring that the file is in contact with both the top and underside of the nail. Start filing from one side, using smooth, controlled motions. Avoid applying too much pressure, as this can lead to nail damage and discomfort. Gradually work your way across the nail, filing in the same direction with each stroke. Focus on creating a smooth, even edge. Continue filing until you achieve the desired shape and smoothness. It's important to be patient and gentle during this process to avoid over-filing or causing any discomfort.
Filing your nails regularly helps maintain their shape and prevents them from becoming too long or jagged. It's important to file in one direction, following the nail's natural growth pattern, to prevent splitting and weakening. By following these steps and practicing regularly, you'll be able to master the art of nail filing and enjoy well-groomed, healthy-looking nails. Remember to clean your nail file regularly to maintain good nail hygiene and prevent the buildup of debris and bacteria.
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Filing technique: hold the file perpendicular to the edge of the nail
A nail file is a tool used to gently grind down and shape the edges of nails. They are often used in manicures and pedicures after the nail has been trimmed using appropriate nail clippers.
There are different types of nail files, each with its own unique characteristics and purpose:
- Emery boards: Small, flat, long objects with emery or emery paper glued to them, making them both abrasive and flexible. They are commonly used for fingernail and toenail care and are inexpensive and disposable.
- Glass nail files: These have a smoother and more even surface, which makes them gentler on the nails and easier to clean. They are preferred by manicurists as they do not splinter the nail like emery boards or metal nail files.
- Metal nail files: These are typically more abrasive than emery boards and can file down nails faster. However, they may splinter the nail and are more expensive.
- Other materials: Nail files can also be made of ceramic, crystal, or metal coated with corundum.
The numbers on a nail file indicate the coarseness of the grit on the surface, or more specifically, the size of each grain. A lower number indicates a coarser grit, while a higher number indicates a finer grit. A finer grit will result in a smoother nail surface after filing.
Now, let's focus on the filing technique you've requested:
Filing technique: Holding the file perpendicular to the edge of the nail
When filing your nails, it is important to hold the file correctly to achieve the desired shape and prevent damage to your nails. Here's a step-by-step guide on how to do it:
- Hold the nail file perpendicular to the edge of your nail. This means that the file should be positioned at a 90-degree angle to the side of your nail.
- Start from one of the outside corners of your nail and file toward the center. Use slow, gentle strokes and avoid filing back and forth across the entire nail tip to prevent damage.
- Continue filing from the same corner, gradually moving the file up and down along the edge of your nail to shape it.
- Once you've achieved the desired length and shape on one side, switch to the opposite corner and repeat the process.
- Work on each side of the nail separately, filing toward the center from the outside corners.
- If you want to give your nails a high shine, use a soft-core buffer with a high grit to buff the nail plate gently.
Remember to always use light, even strokes and work carefully to avoid over-filing your nails. It is also recommended to work with your natural nail shape to maintain strength and prevent peeling, cracking, or breaking.
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Frequently asked questions
Nail files can be emery boards, ceramic, glass, crystal, plain metal files, or metal files coated with corundum. Emery boards are small, flat, and long, with emery or emery paper glued to them, making them abrasive and flexible. Glass nail files are smoother and more even, and less likely to splinter nails.
The numbers on nail files refer to the size of each grain of the bumpy particles (grit) on the file, and the higher the number, the smoother the file. For example, an 80-grit file is more abrasive, while a 1000-grit file is smoother.
File your nails in a single direction, from the edges toward the centre, in one sweeping movement on either side. Avoid filing back and forth, and don't use a sawing motion, as this can lead to tears or breakages.
You can achieve a variety of nail shapes, including round, almond, square, coffin, stiletto, and squoval (a combination of square and oval). The shape you choose depends on your natural nail shape and personal preference.











































