Summer sun you have to know something

Strong ultraviolet laser wrinkle whitening  radiation, not pay attention to the sun, the skin is easily sunburned. But if not timely make sunscreen outdoors, because the skin will also lose the protection and tanned, lead to various skin diseases. Amy crush you, summer sun 5 Mistakes to see if you caught yet?
Error 1: think the longer the higher the SPF value sunscreen time
Sunscreen SPF value shows the ultraviolet light resistance time. But sunscreen SPF30 has reached the longest category SPF100 that the use of sunscreen, sunscreen can not be much time for the skin to increase. So go out, basically use SPF30 it.
Error 2: coping with heavy sunscreen 40 degree heat days
Sultry weather skin itself sweat easily, if the thick smear sunscreen, can only make the skin feel oppressed airtight. At this time you need to do it is to use sunscreen spray! Sunscreen products sprayed on the body, and then unevenness applied by hand or less.
Error 3: Ignore ear sunscreen
Ear is less exposed body parts, but a lot of people because of the summer weather is hot hair Zhaqi later Zhaqi ear is exposed to ultraviolet light. Then the ear have to do with the body as sunscreen.
Error 4: not timely make sunscreen
If you are outside, two hours required once painted sunscreen, apply sunscreen before because efficacy has disappeared within two hours. Unprotected skin, it is easy to be ultraviolet tanning sunburn.
Error 5: The swimming pool in the open air
Summer is a good time swimming, when you can not wait to go swimming, do not forget to select an indoor swimming pool. Outdoor swimming pool because of the aggravation of the reflected wave sunburn tanned situation, as long as the travel time, the skin can not wait for a dark color number. In addition, the lifestyle on three small adjustments can be on your sunscreen project double insurance.

1) Eat more tomatoes
Research shows that eating tomatoes can play a number of sun protection. If everyone consumed 40 grams of tomato paste per day, the risk of sunburn will be reduced by 40%; if coupled with 10 grams of olive oil, then the sunscreen effect will be better.
2) Eat less sensitive vegetables
In particular, it is relatively easy to spot long skin, the best eating in the summer "sensitive" vegetables. Celery, parsley, radish, etc. are "sensitive" vegetables, these vegetables make love long spot of skin pigmentation is more easy to grow. This season should eat some inhibiting pigmentation, the skin becomes white fruits and vegetables, such as kiwi, strawberries, tomatoes, oranges, cabbage and so on.
3) sun without hot water wash
If the sun outside all day, and then hot water wash, just as was the hot water burns. Only cold water can shrink pores,Water oxygen machine  leaving skin cool down, to eliminate red hot back role. The use of hot water, let telangiectasia, congestion, flushing and even grow patches appear sunburn.

You got love OCD do

The outcome in love is human,808nm laser hair removal machine but do not have love, obsessive-compulsive disorder, or the absolute will to men crazy. Do you feel good about yourself, read the following list to determine without you, you can say out loud: I did not!

NO.1 Cancer: Chagang day, care about each other whereabouts.
"What are you doing now?" "Some come back today?" "Who with?" ...... Regardless of where the other party, whether in the end he was in a meeting or sleep, you can not help but always wanted to contact him if do not have all of his whereabouts, I felt so uncomfortable. Leaving little friends are shocked, some even broke up with her boyfriend Cancer, the uncontrolled will play the kind of silent calls, or send a blank message.
Honey, you get a little something in the world, travel, study, work, friends, and so on. Believe me, when your life is getting full, you will not so much time around him all day. Men are all cheap nature, the more you take him seriously, he does not take you more seriously, while you keep your sense of mystery and space, he will want to know you anti explore you.
NO.2 Scorpio: Lovers received any phone will seemingly casually ask: Who called?
You say you're just curious, rather than suspect anything? If you say this is not the parents who call the phone, you will not continue to ask him? You say you did not, or did not think the other side of the landing QQ, mailbox, peeking his phone call records, Inbox, Outbox it? Once partners and others very close (whether homosexual or heterosexual), you will feel unhappy, frustrated.
Do not keep letting your "sixth sense", it continues, even if the other party is not a third party, you will be forged out of a third party, abruptly pushed him to the arms of another! Usually the other person says to you love, then recorded using a mobile phone, he wrote love letters or sweet messages also carry, listen, look at those sweet confession, emotional instability can receive timely gentle comfort.
NO.3 Leo: When lovers do not answer the phone at once, and my heart faint blaze.
Your phone has ten or twenty reasons for his call did not answer the phone, you will not take his calls right confidently. Once he did not immediately pick up the phone, then your heart is absolutely countless flames to jump up, he will fight desperately to hit him pick up the phone, even if you are not a big deal. Whatever the final fight did not get through, regardless of whether the other justified, they will definitely have to bear some of your anger and questioned the Thunder endlessly.
Aerial more, will grow old. When bad mood up, and quickly mercilessly deep breath, let the body get a lot of oxygen to relieve uncontrolled emotions. Then give yourself something to do, play games, read novels, to do housework when their attention, and will not fall into anger get out.
NO.4 Aries: Be sure to eleven seen each other friends and colleagues.
Regardless of the other like it or not, the time to mature, be convenient when a friend or partner to participate in the company party, you will ask him to take you there. If he has not, you will say that he does not respect you, ulterior. Or to rush to his company to find him, that is to say to his surprise, he actually wanted to declare sovereignty. So no problem, you even according to their own impression of his friends and colleagues, and gradually developed into interfere with his friends, he was not allowed with certain people you do not like dealings.
If you do not often quarrel with him because of these things, you have to do is respect for him to make friends, to learn in front of his friends and colleagues to maintain his face, when he was in front of his friends often praise you when you do not have to mention that he also I will be very willing to take you into his circle of friends. Its force him, let him feel you bring is a very proud thing!
NO.5 Sagittarius: like micro-Bo, happy sun exposure photographs.
You fear that other people do not know you're happy, frequently updated daily microblogging, wrote today what gift he gave you, tomorrow you say gone, there are pictures and the truth. These are still "side dishes", but people can not stand is that often use microblogging instead of SMS, open dialogue with him - "Now I get out of bed," "The weather today is really good," "pro, you do me busy bar "...... their actions unavoidably reported you so reluctant to SMS fee, money also seems to flow right?
Microblogging circulating this statement "on the microblogging large sun of happiness, they have been split up," you are now tan happy if someday really broke up, to see how you end up! Happy men than women perceived more rational, more hidden than this high-profile show off, he prefers his real concern for you, prefer to enjoy each other only perceive happiness.
NO.6 Gemini: see daily horoscope, fortune love interest.
First of all, thank you very much for the "Technology Ziwei constellations" concerned that, although we are very confident their fortune, but you can not therefore superstition. If superstition, and if fortune said he would fight today, it is inevitable psychological suggestion, how are noisy on one. Lucky these things can best believe, if he would not cooperate, you force him to do, instead of feeling negative. Constellation analysis can be used as a reference, but you still want from their own, which improved to improve the reflection of reflection.
You're good for your feelings, for his own good,  Laser for Tattoo Machine  but also to change their mode of thinking of it, you feel good that he was not needed. If this is for his own good, then more time to understand what he really needs for his needs and then make adjustments, so that he will really feel you are good to him.

3 steps to lose weight office

Every wear unlined season, Laser Beauty  people began to lose weight. However, during the day, go home at night and want to eat dinner early exercise, since not too tired to move. Here, the author as a US scholar to teach you three strokes office weight loss tips.

A. slimming lunch
Get five or six hours, the circadian clock gene BMAL1 put food into fat accumulation function is weak. Therefore, we do not care about lunch, not easy to eat more fat. Dinner should pay attention to carbohydrate intake. To help ease the rise in blood sugar choose not easy to accumulate fat and low-calorie foods. However, note the following three points to lose weight Lunch:
1. Do not heat lunch
It turns anti-carbohydrate starch hydrolysis of starch contained in the cold. Cold carbohydrates suppress rise in blood sugar to prevent weight gain, and impede the absorption of sugar and fat. Therefore, it is best to eat lunch room temperature. In addition, lunch add some vinegar can also help lose weight, because vinegar has a functional decomposition of sugar.
2. Do not mix the sugar and carbohydrates
Rice, pasta, bread can be eaten, but can not eat sweets. Because sugar can make blood sugar rise.
3. 30 minutes before meals to drink vegetable juice
Drink vegetable juice before meals can alleviate the rise in blood sugar, if not before meals to drink, then dinner drink also effective.
B. people who like to eat snacks
Usually people like to eat snacks to lose weight during snack time adjustments can! Select clock gene BMAL1 function is weak or three in the afternoon period of time is not easy to gain weight, eat snacks anyway. In addition, Western-style, high-calorie snacks, it is best to eat Japanese sweets; people like to eat chocolate, you can select the block containing 70 percent cocoa dark chocolate. Cocoa mass containing fat is difficult to absorb, won the "first lady of the world," the title of Miss ERIKA also recommend eating small amounts of dark chocolate snacks.
C. in the office doing exercise
Here to tell us sitting in a chair under the table can secretly do sports. Lower body proportion accounted for 70% of the body, lower body muscle exercise, can promote metabolism, not only lose weight but also the United States enough effect.
1. Shaping thigh gap
Work, sitting in a chair with feet together, knees sandwiched handkerchief. If the inner thigh muscle weakness, then you will feel tired, if you fill the recession will create the perfect thigh muscle.
2. shaping slim calf
Sitting in a chair with feet together, he repeated double heel elevation drop operation. Not only to prevent swollen legs, but also to create a shapely calf Oh!
Lose weight perseverance, today introduced  Laser hair removal machine the method is simple and can be done in the office. You must try Oh!

Up late no time to skin, his face haggard wore it to work? Rescue lazy! Super practical skin care Cheats!

Rescue lazy

Warm spring day  IPL hair removal always wanted to sleep late, but thought after getting along with red skin step, I think they all feel very cumbersome, bloated face wore directly go to work? Stop it! Try lazy love skin care method, simplifying the daily skin care steps, time saved a lot better to sleep for a while now!

1, while the locker apply when "Water Mask"

After washing the face, make-up water can be poured into the compression mask paper, apply to the face after the hair change clothes. So in addition to follow-up on makeup can help, not because of dry skin and makeup delay time.

If there is no paper mask, you can pour in the 3-4 block lotion cotton, and then on the forehead, cheeks and chin, the same can infuse instant moisture for the skin.

2, skin care products "hybrid"

If you rush out the door, you can try finished wiping make-up water, or directly to the essence of beauty lotions and creams oil mixed use, save time each painted skin care products.

Looking finish, you can also try moisturizing cream (do not use liquid, texture is too thick moisturizing cream is not very appropriate), mixed use liquid foundation. This will make the makeup more easily attach onto face.

3, heat exfoliating

I think facial swelling, or looking bad, the easiest way is to heat the skin. A hot towel can make the skin blood circulation more smoothly, and so horny skin softening, use exfoliating products to save time.

4, a multi-purpose cream

If that do not want to bother to different parts of the skin were painted different skin care products, you can choose a bottle of skin care products to fully painted. Eye is a large number of skin care products applied to various parts of the face of the most suitable products, because the most delicate skin around the eyes for eye skin products, but also can be used for face another location.

You can select the focus moisturizing and moisturizing cream, the first in the eye after smearing, will apply to the rest of the way at the nasolabial folds and lip weeks, both lazy and can repair the nasolabial folds and lip skin.

5, the use of multi-function makeup base

James finished sunscreen even want to wait on the makeup of the time saved, you can use up base containing sunscreen.  laser hair removal machine  Want a little faster, you can use colored up base containing sunscreen with toning effect, after sweeping the Powder makeup can be completed, convenient and fast!

related articles

http://beauty88.publicoton.fr/historical-development-of-laser-freckle-743382

http://blogs.ados.fr/beaute-laser/depilacion-postoperatorios-depilacion-4890837.html

http://blogs.psychologies.com/taibobeauty/depilacion-depilacion-principales-250168.html

http://taibobeauty.blogs.charhadas.com/2016/04/18/el-mejor-metodo-de-depilacion-permanente-malentendidos-metodo-de-eliminacion

http://msnho.com/blog/taibobeauty/best-method-permanent-hair-removal-permanent-hair-removal-method-large-pk


http://taibobeauty.blogcu.com/son-teknoloji-epilasyon-kalici-epilasyon-tarafinin-en-iyi-yontem/20554323

http://taibobeauty.publicoton.fr/the-best-method-of-freezing-hair-removal-permanent-hair-removal-743574

Principios y características de la depilación de semiconductores

longitud  Laser instrumento de depilación  de onda de 808nm puede alcanzar efectivamente la profundidad objetivo de penetración del tejido diana (papila del pelo), la duración de pulso apropiado suficiente para proteger el tejido diana y el daño térmico del tejido que rodea casi no afectado; garantizar la cantidad correcta de densidad de energía en un tiempo adecuado para proporcionar una suficientemente fuerte la salida de energía es suficiente para dañar el tejido diana y el tejido normal apenas se ve afectado, medidas adecuadas de protección de la piel para garantizar suficiente daño a los tejidos diana, piel casi no afectado, protegiendo de este modo la seguridad del tratamiento.

-De múltiples impulsos de luz láser de alcanzar los requisitos de diseño anteriores, mientras que la serie de depilación semiconductor en el uso de más baja densidad de energía folículo de cabello de patrón se calienta por encima 75 ℃ y se mantiene durante algún tiempo deslizando la pieza de mano de tratamiento (estado 10 Hz) folículo piloso inactivado por calor coagulación , con el fin de lograr el propósito de la depilación permanente.

daño de la luz folículos pilosos tienen tres maneras: la termogénesis (calentamiento selectivo parcial de los folículos pilosos), efectos mecánicos (choque o Vacuolación grave); reacciones fotoquímicas (mediante la producción de oxígeno singlete o radicales libres tóxicos para matar las células del folículo piloso) Tres formas en las que pueden reducir el cabello.

ciclo de crecimiento del cabello

el crecimiento del cabello 1, a largo plazo es cíclica, cada ciclo incluye una fase de crecimiento (anágena), catágena (Catágena), fase estacionaria (telógeno). En general, el crecimiento del cabello es de unos 3 años, Catágena unas tres semanas, descansando unos tres meses; diferentes partes del ciclo de crecimiento del cabello no está sincronizado, cada uno con su propio ciclo de crecimiento. Diferentes partes del ciclo de crecimiento del cabello con una longitud de aproximadamente, por ejemplo, ciclo de crecimiento de la ceja de alrededor de dos meses.

2, en la fase de crecimiento (anágena): crecimiento de pelo activa, la mayoría de las células de melanoma.

3, catágena (catágena): crecimiento del cabello estática, reduciendo el número de capilares, atrofia de la papila dérmica, los melanocitos dejan de producir melanina.

4, en reposo (telógeno): folículos pilosos y la dermis papilar separación, pérdida de cabello.

característica

1. El láser puede ser totalmente absorbida por el folículo piloso;

2. El láser puede pasar eficazmente a través de la piel a la posición folículo del pelo donde la longitud de onda del láser semiconductor es de 800 nm, en la región del infrarrojo cercano del espectro, la absorción de la melanina es mejor, mientras que la penetración profunda de la dermis y el tejido adiposo subcutáneo, que actúan sobre diferentes partes y la profundidad del folículo piloso, eliminando de forma eficaz cualquier parte del vello corporal y profundidad.

3. El pulsos de láser mucho tiempo para ajustar, mientras que la protección de la epidermis eliminación de diferente grosor del cabello, el tiempo del impulso de láser necesaria para obtener resultados óptimos de eliminación del vello y el grosor del cabello. El cabello más grueso requerido semiconductor láser depilación ya mientras que un tiempo de impulso láser del láser de 5 ms a 100 ms, para obtener el efecto deseado de eliminación de pelo, sino también proteger eficazmente la epidermis del daño térmico.

4. No pigmentación, un láser de semiconductor más profunda profundidad de penetración, la piel absorbe la energía del láser es pequeña, que no produce la pigmentación;

5. efectos secundarios más eficientes, cómodo y menos, en comparación con la técnica convencional de ancho de pulso depilación láser, la energía y el tiempo de irradiación es ajustable, la especificidad y la selectividad son altos, sistema de refrigeración síncrona se puede reducir en comparación con la tecnología de eliminación de pelo EA la luz la posibilidad de daños en los tejidos alrededor de los folículos pilosos;

6. depilación permanente. La depilación láser semiconductor después de varios post-tratamiento puede lograr el propósito de la depilación permanente;

7. indolora. La primera depilación láser es muy doloroso, por lo que la gente está muy preocupada por esto, pero la depilación láser semiconductor para que usted pueda resolver este problema, no tienen que preocuparse habrá dolor;

selección de los pacientes

1, tipo de piel del paciente (Ⅰ-Ⅵ tipo)

(1) General Ⅰ-Ⅱ tipo de piel se puede utilizar la salida de longitud de onda 600-1200nm de diversos tipos de equipo, y más de tipo de piel y Ⅳ de aproximadamente 600 nm de longitud de onda dispositivo de salida debe tener cuidado;

(2) general Ⅰ-Ⅲ tipo de piel puede tolerar una mayor densidad de energía, y escriba Ⅳ encima de la piel seleccionar cuidadosamente una mayor densidad de energía;

(3) Para el tipo anterior Ⅳ y la piel se deben utilizar longitudes de onda más largas mayor anchura (y debe reducir la potencia de salida de energía de la luz) y el uso de refrigeración activa.

2, el color del pelo y el alcance de espesor

(1) los pacientes con piel clara y pelo negro y grueso es ideal para la depilación fototerapia, la tecnología de depilación es todavía insuficiente para la eliminación permanente del pelo y pequeños pelos blancos existente;

(2) la presencia de seca el cabello pigmentado antes de la depilación gran impacto en lo que el tratamiento no puede ser el desplume o encerado.

3, algunos medicamentos o desequilibrio hormonal puede estimular el cabello afecta a los resultados de depilación, es preciso señalar que, antes y después del tratamiento con los medicamentos apropiados y el desequilibrio hormonal atención de depilación etiología.

4, podría causar un aumento en el crecimiento del cabello en algunos pacientes: 1. Este fenómeno Fabricantes de IPL   se produjo en el lado hay una pequeña porción de pelo oscuro jóvenes Ⅲ Ⅳ-mujeres de piel de tipo; 2 aumento del vello en el área de tratamiento se puede producir a veces ocurren en el área de no-tratamiento, los tres primeros del tratamiento anterior debe informar al paciente.

Las ventajas y desventajas de la depilación láser

Enfrentados Permanent hair removal machine  con el pelo grueso cuerpo después de un montón de amigas son muy molesto y confundido, que está tratando diversos métodos de eliminación del vello, grosor del vello corporal crecerá rápidamente en un corto período de tiempo, entonces al final qué tipo de método para poder ayudar propia de depilación a fondo que? De hecho, la depilación láser se ha convertido en una gran cantidad de mujeres eligen una eliminación del vello, vamos a ver los beneficios de la depilación láser, así como desventajas.

De hecho, esta eliminación del vello de alta tecnología, de hecho, no habrá pros y los contras de los puntos, por lo que la elección de la eliminación del vello en la vida cuando todos debemos prestar atención y, a una comprensión más completa de estos métodos de depilación, fue posible reducir la posible adversa afectada.

Ventajas: haz de láser emisor de superficie de la piel penetrará los folículos pilosos finalmente absorbidos por la energía del láser es absorbida selectivamente, los folículos pilosos dañados, el pelo ya no puede crecer. método conveniente y eficiente.

Desventajas: El tratamiento de depilación láser actual y no todos los folículos, una vez destruido por completo, sino una destrucción lenta, limitada y selectiva. Por lo tanto, tenemos que ser repetido varias veces al año con el fin de alcanzar realmente la depilación permanente.

Estas son algunas de las ventajas y desventajas con respecto a la introducción de la depilación láser, Láser de depilación máquina  esperamos que estos problemas tienen una comprensión más completa siguiendo estas presentaciones, siempre y cuando se utilice de manera más científica y saludable de la depilación, no va a hacer daño a sus cuerpos, sino también jugar un efecto de depilación.

Inventory details Summer epilation hair removal

Hazards of hair removal methods

Beauty sistema de depilación láser de 808nm parlor Laser hair removal (sanitary  environment to carefully choose)

If you prefer the beauty of the hair removal technique is recommended when choosing a beauty salon to learn more about the hospital's environment and health, and to ensure that there are beauticians and replacement console pad of paper handwashing habits.

Waxing (easily lead to folliculitis)

Waxing can be more quickly shed a large area, and longer duration, but no more than eight weeks. During epilation may cause skin hair root, hair follicle distortions, resulting in hair health, easy secondary folliculitis or other types of skin infections. Diabetes, varicose veins, moles, warts, skin ulceration and inflammation, patients should not use this method.

Forceps plucking (sagging love scars)

Tweezers can be uprooted hair follicles from the depths, the "extermination" effect, but must be careful plucking, if too dense, too much pull on the skin damage caused is actually very large, it may cause skin redness , inflammation, resulting in pigmentation, loose skin, serious people will appear like goose bumps like convex scar, affect the appearance.

Shaving himself with a razor

You can use special razor or electric razor, look in the mirror, armpit to armpit conduct cleanup, use the process to be careful to avoid scratching the skin.

Epilation details deal with the problem

Period before and after depilation (pain doubles)

Menstrual pain female body is the most sensitive period, hair removal have a strong sense of pain, this pain may even extend to the after hair removal. Because it will produce hormonal changes before and after menstruation, to the outside of the foot stimulation can affect blood flow enhancement, feel more pain. It is preferably carried out after the holidays waxing, hair removal is best during ovulation.

Epilation go horny (sensitive skin thinning)


Some women believe that in the epilation go horny allow subsequent epilation more thorough clean, not knowing or containing exfoliating retinol products make the skin thin, fragile sensitive because, if the hair removal, skin severe embrittlement, even produce burning sensation.

Hair removal do not care (inflamed pores)

A lot of people will do before epilation various preparations, but care after hair removal does not mind, hair removal machine    after the depilation avoid using hot water, cold water required, just make the pores shrink expansion, calm the skin. After cleaning, the rapid replenishment to the skin, hair removal after one week, do not use soap and other basic toiletries, cleaning.

The principle of laser wrinkle
The main reason  Máquina de arrugas con láser  for wrinkles is to reduce skin collagen, thinning of the dermis. * The use of new laser - United Technologies RF exposure to the skin, thickening of the dermis can reduce wrinkles, the principle is: to stimulate collagen layer damaged, generate new collagen, which fill wrinkles due to a decrease in collagen in the skin; heating the dermis layer, using the body's own repair functions to stimulate tissue regeneration, reconstruction, so that thickening of the dermis.

Rational design of the laser through the skin melanin, hemoglobin, especially water absorbed laser energy is released, and the photothermal effect to convert it to generate heat, which activates dermal fibroblasts and other stromal cells produce new collagen, elastin and various inter-cellular matrix and tissue remodeling occurs, like a lazy skin to do sports, to make it through exercise and renewed youthful vigor. Skin moisture and elasticity increase several times after treatment, improving texture, reducing fine wrinkles.

Laser wrinkle effect how
Pixel laser wrinkle on the basis of the above laser wrinkle innovation and invention of new technologies wrinkle. It is a laser beam through a tiny role in the wrinkles of the skin surface, this approach is now more accurate method of wrinkles, small injuries, basically no side effects.

Laser wrinkle after wrinkle face the first day would be more red, slightly swollen, which is a normal reaction after treatment. As long as about 20 minutes of ice, face discomfort will soon subside. You can feel the skin is very tight, pressing flexible. Wrinkle first 4 days, the skin is no longer red and swelling, reduce the oil secretion, reduce the appearance of acne and India, small wrinkles disappear, face some places begin to scab, then do not worry, wait for scab off on their own after the can see the white skin. Wrinkle about a week, all of the basal scab off, acne and India basically disappeared, color noticeably brighter, and will be further improved. Wrinkle tenth days, basically solve all skin problems, skin soft and smooth, gently press, full stretch, acne disappeared, pigmentation disappeared, small wrinkles disappear, the skin white and shiny.

Laser wrinkle is now very common non-surgical wrinkle method, since almost no non-surgical pain without surgery sought after by many people, laser wrinkle technology is its thermal effect of the laser beam to the target tissue on the cause tissue carbonization, coking make lesions removed with minimal dermal damage and wrinkle-free effect carbonization resurfacing technology. Clinically, laser wrinkle method is applicable to a variety of small facial wrinkles, such as the mouth wrinkles, forehead lines, crow's feet, etc., can be achieved very satisfactory results. In general, laser wrinkle holding at least a few years, because the skin of the people is to update a specific period, after a certain period, with age, it will have the emergence of new skin problems. Because it is using its own collagen growth heal wrinkles, laser wrinkle effect is long lasting, and there are no side effects, La depilación láser de la máquina  a few years later when the skin collagen decay, you can also intensive treatment to maintain insurance or long youthful luster.