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UV gel polish

Release time:

2015-10-16 17:03

UV Gel Polish Encyclopedia and Resin Selection

UV gel polish

I. A Comprehensive Guide to Gel Nail Polishes

1. Definition

(1) A new type of nail art method; (2) Mildly toxic and odorless; (3) Environmentally friendly and healthy; (4) Durable and easy to use; (5) Diverse patterns.

2. Sensory and Physicochemical Indicators

(1) Viscous; (2) Low odor; (3) Excellent viscosity; (4) Fast curing; (5) Strong adhesion; (6) Stability.

3. Classification (by coating method)

(1) a. Sealing gel; b. Color gel; c. Base gel. (2) One-step gel / 3-in-1 nail gel.

4. Base coat

Features: Rich color, resistant to cracking and settling, easy to remove, no need for filing or grinding, and gentle on nails.

Surface drying: Does not surface dry; after curing, a small amount of residual glue may remain.

Viscosity: 2000-3000 cPs.

Curing time: UV: 120s, LED: 90s.

Removability: 2–5 minutes.

Adhesion: 30 days.

Function: Applied to the polished and cleaned nail surface, it serves to protect the nails, increase their hardness, and enhance adhesion.

Reference price: 12–18 yuan/15 ml.

Precautions for Use: (1) Leave a 0.5 mm gap from the edge of the flesh; (2) Do not wipe with alcohol after curing; (3) Pay attention to the edging around the fingertips.

5. Colored glue

Features: Rich color, non-toxic and odorless, and gentle on nails.

Surface dryness: Surface dry.

Viscosity: 4000-5000 cps.

Curing time: UV: 90–120 s, LED: 60–90 s.

Removability: 2–5 minutes.

Adhesion: 30 days.

Function: Used to apply on the base coat to achieve decorative effects such as solid colors, pearlescent finishes, shimmering glitter, and sequins.

Reference price: 12–18 yuan/15 ml.

Precautions for Use: (1) Apply within the base coat area; (2) Ensure sufficient curing time; when curing with a UV lamp, keep your thumb horizontally positioned; (3) Pay attention to sealing the edges of the fingertips; (4) Do not apply too thickly, as this may cause wrinkling or shrinkage; (5) For solid colors, apply two coats. Some jelly-colored shades may not achieve a fully solid color effect.

6. Sealant胶

Features: Long-lasting color retention, resistant to chipping, easy to apply, and forms a protective layer on the nail surface, enhancing the color’s durability and brilliance.

Surface dryness: Completely surface-dry.

Viscosity: 2000-3000 cPs.

Curing time: UV: 120s, LED: 90s.

Removability: 2–5 minutes.

Adhesion and brightness durability: 20 days.

Function: Used to coat the surfaces of base gels, color gels, extension gels, and nail-art gels, providing protective features such as wear resistance and scratch resistance. It can enhance the shine of manicures and must be used in conjunction with a base gel or other nail gel products.

Reference price: 12–18 yuan/15 ml.

Precautions for Use: (1) Ensure complete coverage of the base layer during application; (2) Allow sufficient curing time, and be sure to place the thumb horizontally when curing under the lamp; (3) Pay attention to sealing the edges around the fingertips.

7. One-step glue (three-in-one nail gel)

Features: Rich color, resistant to cracking and settling, easy to remove, no need for filing or grinding, gentle on nails—this one-step gel perfectly combines the functions of base coat and top coat in a single product.

Surface dryness: Completely surface-dry.

Viscosity: 4000-4500 cps.

Curing time: UV: 120s, LED: 90s.

Removability: 5–8 minutes.

Adhesion and brightness durability: 20 days.

Function: Applied directly onto a polished and cleaned nail surface, one bottle delivers the manicure effect of three bottles (base coat + color gel + top coat).

Reference price: 16–20 yuan/15 ml.

Precautions for Use: (1) Thoroughly buff the nail surface, especially the nail tips; ensure there is no oil on the nail surface. (2) Allow sufficient curing time; when curing the thumbs, make sure to place them horizontally. (3) Pay attention to sealing the edges of the nail tips. (4) Do not apply too much product in a single coat—this could lead to wrinkling or shrinkage. (5) For solid colors, apply two coats; however, some jelly-colored shades may not achieve a fully solid color effect.

8. Classification (by color gel effect)

(1) Solid-color gel polish; (2) Vibrant-colored gel polish; (3) Cat-eye gel polish; (4) Glow-in-the-dark gel polish; (5) 3D phantom gel polish; (6) Snake-pattern gel polish; (7) Ombre gel polish; (8) Metallic gel polish; (9) Sugar-texture gel polish.

9. Basic Testing Standards

(1) Fast curing; (2) Does not yellow in color; (3) No shrinkage; (4) No wrinkling; (5) High gloss; (6) Non-irritating.

10. Specific Performance Metrics

(1) Fast curing; (2) Excellent adhesion to human fingernails; (3) Flexibility and bend test exceeding 120° with no cracking or bursting; (4) Wiping with 500g of 99.8% analytical-grade alcohol causes no loss of gloss or flaking; (5) No noticeable exothermic reaction; (6) Vibrant colors with no yellowing; (7) High gloss and high fullness; (8) Low skin irritation and no unpleasant odor; (9) Can be removed in 3–4 minutes using nail polish remover.

11. Nail Art Steps

(1) Clean the nails; (2) Apply base coat; (3) UV cure; (4) Apply color gel (if the color isn’t vibrant enough, apply two coats of color gel consecutively); (5) UV cure; (6) Apply top coat; (7) UV cure.

12. Preparations Before Nail Art

(1) Nail shaping: Use a sanding strip to shape your nails into the style you prefer.

(2) Remove cuticles: Use a steel pusher to gently treat the cuticles on the nail surface, working from the outside toward the inside.

(3) Remove cuticles: Use a cuticle fork to gently scrape away the cuticles along the nail edges. (Note: If cuticles are not thoroughly removed, it may affect the longevity of the gel polish.)

(4) Buff the nail surface: Use a sponge buffer to buff the surface of the nails (Note: Make sure to buff thoroughly; otherwise, it will affect the longevity).

(5) Clean the nail surface: Use a dust brush to remove dust from the surface of the nails.

13. Nail Art Steps

(1) Apply base coat; (2) Bake the base coat; (3) Apply top coat; (4) Bake the top coat; (5) Apply seal coat; (6) Bake the seal coat; (7) Wipe off the seal coat.

14. Nail removal steps

(1) Remove the top coat: Use a sanding strip to remove the top coat from your nails, making it easier to remove the nail polish.

(2) Nail-removal pack: Wrap all your fingers with the nail-removal pack, wait for 10 minutes. The nail-removal pack contains nail-removal liquid and nail-removal cotton pads.

(3) Remove the gel: Use a steel pusher to remove the gel polish.

15. Phototherapy nails: Phototherapy nails are artificial nails that are formed by curing phototherapy gel under the irradiation of a UV lamp.

16. Advantages of phototherapy nails

(1) Artificial nails; (2) Not easily broken; (3) Tough and flexible; (4) Protects natural nails; (5) Corrects nail shape.

17. Pros and Cons of Phototherapy Nails

(1) Difficult to remove the nail polish: It takes a long time to file down the polish, and after filing it down to a very thin layer, you then need to soak the nails in a nail-removal solution.

(2) Suboptimal nail health: After removing nail polish, your nails may become dry, dehydrated, and lacking in nutrients. To provide them with sufficient nourishment, you’ll need to apply some nourishing oils to your nails.

(3) Damaging the nails: Gel nails are prone to damaging your own nails when removing them.

18. Nail Art Techniques (LED/Nail Lamp Nails)

(1) Painted art; (2) Crystal carving; (3) Gel colors; (4) Inlaid art.

19. Things to keep in mind when applying gel nail polish

(1) Dead skin must be thoroughly removed;

(2) Be sure to apply two coats of pH-balanced solution before applying the base coat.

(3) The base coat must be applied in extremely small amounts—too much can easily cause the glue to shrink.

(4) The top-color adhesive must be applied thinly—two coats for solid colors and three coats for light, translucent colors—to prevent wrinkles.

(5) The seal coat shouldn't be applied too thickly—pay attention to using an appropriate amount.

(6) Do not apply the no-wash sealant to surfaces with removable adhesive (Note: The no-wash sealant is prone to cracking).

(7) Use an adequate amount of sealant gel cleaning solution for cleaning.

(8) Avoid mixing products from different brands;

(9) Use the nail polish brush to apply the gel polish along the nail surface at the same angle, with the same pressure, speed, and curvature. Avoid applying excessive pressure.

20. Phototherapy lamp

(1) Conventional UV phototherapy lamp; (2) LED-UV phototherapy lamp.

21. Advantages of LED-UV Phototherapy Lamps

(1) Ultra-high illuminance; (2) Long service life; (3) Environmentally friendly and pollution-free; (4) Low energy consumption; (5) Instant-on/off capability; (6) No thermal radiation.

22. Comparison of Power Output Between Two Phototherapy Lamps

	Standard UV phototherapy lamp			LED-UV phototherapy lamp
Power	9 watts	18 watts	36 watts	9 watts	18 watts	36 watts
Base coat	180 seconds	150 seconds	120 seconds	40 seconds	30 seconds	30 seconds
Colored glue	180 seconds	150 seconds	120 seconds	40 seconds	30 seconds	30 seconds
Sealing adhesive	240 seconds	200 seconds	180 seconds	50 seconds	40 seconds	40 seconds
Wavelength	370nm-390nm

II. Selection of UV Resins

1. Characteristics of UV resin used for base coat

(1) Low-energy curing; (2) Excellent adhesion; (3) Good leveling properties; (4) Resistant to cracking; (5) Strong and flexible, with excellent bend resistance; (6) Easy to remove; (7) Non-toxic and odorless; (8) Rich and vibrant color; (9) Low skin irritation.

2. Recommended UV resin for base coat

(1) B-151; (2) B-216; (3) B-574; (4) B-372/B-375; (5) B-590/B-509B.

3. Requirements for UV Resin Used in Color Adhesives

(1) Strong toughness and excellent bend resistance; (2) Low skin irritation; (3) Good fullness; (4) High and long-lasting gloss; (5) Non-toxic and odorless; (6) Excellent deep curing performance; (7) Good pigment wetting properties.

4. Recommended UV resin for colored glue

(1) B-153; (2) B-375; (3) B-574; (4) B-519; (5) B-530.

III. Selection of UV Monomers

1. Single-position, single-entity recommendation

(1) ACMO; (2) HPMA; (3) HEMA; (4) IBOA; (5) IBOMA.

2. Recommended dual-functional monomers

(1) TPGDA; (2) DPGDA; (3) HDDA.

3. Recommendation of the Three Officials Unit

(1) PET3A; (2) TMPTA; (3) TMP3EOTA; (4) G3POTA.

4. Single recommendations for the Four Officials and Six Officials

(1) PETTA; (2) DPHA; (3) Di-TMPTA.

IV. Selection of Photoinitiators

1. Classification

(1) Benzil compounds: 651;

(2) Benzoin and its derivatives: benzoin;

(3) Thiazine derivatives: ITX, CTX, DETX;

(4) Acyl phosphine oxides: TPO, TPO-L, 819;

(5) Alkyl ketones: 1173, 184, 2959, 907, 369;

(6) Benzophenones: BP.

2. Morphology

Solid: 184, 2959, 651, ITX/CTX/DETX, TPO/819, BP.

Liquid: 1173, MBF, TPO-L.

3. Wavelength

Model	BP	651	184	1173	2959	907	369
Wavelength	256nm 337nm	254nm 337nm	246nm 280nm 333nm	245nm 281nm 331nm	237nm 331nm	232nm 240nm 307nm	233nm 324nm
Model	TPO	TPO-L	819	ITX	DETX	MBF	PBZ
Wavelength	295nm 380nm 393nm	242nm 280nm 370nm	295nm 370nm	255nm 380nm	261nm 285nm	255nm 325nm	289nm

4. Melting point

(1) 40-50℃: BP/184;

(2) 60-70℃: 651;

(3) 70-80℃: ITX/DETX/907;

(4) 80-90℃: 2959;

(5) 90-100℃: TPO;

(6) 110-120℃: 369;

(7) 120-130℃: 819.

The higher the melting point, the more difficult it is for the photoinitiator to dissolve and disperse.

5. Recommended Photoinitiators

(1) TPO; (2) TPO-L; (3) 819; (4) 907; (5) 369; (6) ITX.

6. Instructions

(1) The wavelengths of TPO, TPO-L, 819, 369, and 907 meet the requirements for nail lamp applications.

(2) The addition of 369 and 819 significantly affects the appearance of gel nail polish, causing it to turn directly into a deep yellow color. Therefore, they are not recommended for use in base coats or top coats.

(3) The addition of 651, 369, and 819 significantly affects the yellowing of the cured film of nail gel polish, resulting in poor yellowing resistance.

(4) The systems based on 184 and 1173 have low photoinitiation efficiency when cured with phototherapy lamps, making them unsuitable.

V. Recipe Recommendations

1. Recommended base coat formula

Ingredients	Proportion	Note
B-372	55.7	3-Component Polyurethane
B-151	15	Modified epoxy
ACMO	20	Single official single entity
HEMA	5	Single official single entity
TPO	4	Photoinitiator
EFKA3777	0.3	Flow agent
Total	100

2. Recommended formula for colored glue

Ingredients	Proportion	Note
B-375	47.2	3-Component Polyurethane
B-530	20	Polyester
ACMO	20	Single official single entity
TPO	4	Photoinitiator
907	2	Photoinitiator
ITX	1	Photoinitiator
BYK9076	0.2	Dispersant
TEGO920	0.3	Defoamer
EFKA3777	0.3	Flow agent
Color paste	5	Pigment
Total	100

3. Recommended formulation for seal coat adhesive

Ingredients	Proportion	Note
B-574	35.7	Polyester
B-151	10	Modified epoxy
B-619W	20	6-Component Polyurethane
TMPTA	20	3 official entities
ACMO	10	Single official single entity
TPO	4	Photoinitiator
EFKA3777	0.3	Flow agent
Total

The above-mentioned indicators and recommended performance levels are measured under fixed conditions and do not guarantee suitability for all intended applications. For different application purposes and conditions, users must independently verify the formulations to ensure compliance with requirements.

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