How to distinguish between chemical fiber and pure hair calligraphy brush

Buy wolf hair, don't buy white clouds. Don't buy too cheap.

Pull the roots and try it, wool has a large number of protein components, and the taste of our hair is the same. Just smell it.

1. Combustion method.

Ignition of chemical fibers has a special odor. Wool burns with the smell of burnt feathers.

2. Look at the shape after combustion.

The chemical fiber is a black solid. Wool turns gray at the touch of it.

Take a little silk thread and burn it over fire....What doesn't end up in a ball is the fiber hair...

Burning the hair with fire can be made into the end of the hair.

It is a hard particle and a chemical fiber.

Wool is stinky after burning because of the presence of animal protein.

The chemical fiber will shrink into a ball or ball, and it has a peculiar smell.

Cotton and linen into powder, tasteless.

The inspection of fabrics is divided into several categories: visual inspection, combustion method and instrumental measurement method, but with the development of textile materials research and development technology, the first two methods can no longer meet the needs, and can not provide reliable judgment, so it is best to carry out professional testing.

Composition cotton: cellulose, hemicellulose.

Hemp: cellulose, pectin.

Wool: animal protein.

Chemical fibers: all kinds of polymers and their mixtures (polyethylene, polyester, polypropylene, etc., different chemical fiber composition).

Cotton and linen have no smell, wool and burnt hair smell a sheet, and chemical fibers are smelly.

Attributes: Cotton belongs to plant fibers, wool belongs to animal fibers, and chemical fibers include polyester, nylon, acrylic, spandex, etc.

How to discern?One look at the appearance, the second look at the feeling, the third look at the static electricity, and the fourth look at the combustion.

1. Appearance. The surface of cotton has no luster, wool and chemical fibers have a noticeable luster. There is not much fleece on the surface of the sweater woven from cotton, and there will be obvious fleece on the surface of the wool sweater, but the wool has been treated with mercerized anti-pilling.

There will be less fleece on the surface, and whether there is fleece on the surface of chemical fibers such as acrylic fiber or the length of fluff is determined according to the needs of the product, and there is no certainty.

Second, the feeling. Cotton feels rougher and stiffer than other fibers, but a cotton sweater with a fine needle and a pull frame will feel softer and smoother, and a thick sweater will be very stiff. Wool is relatively smooth and soft, but it also depends on the grade, sheep wool is also a kind of wool, sheep wool is very prickly to the touch.

Chemical fibers are usually smooth, but there are also special treatments that have different hand feels. Cotton has good air permeability, sweat absorption and moisture release, and general warmth, and high-twist cotton yarn is usually used for spring and summer clothing. Wool has good moisture absorption, especially very good warmth.

Chemical fibers have poor air permeability and moisture absorption, are uncomfortable to wear, and do not have high warmth.

3. Static electricity. The static electricity phenomenon of cotton fiber clothing is not obvious, wool has a certain static electricity phenomenon, and the static electricity phenomenon of chemical fiber is more serious.

Fourth, combustion. When the cotton is in contact with the flame, it burns rapidly, and it can continue to burn after leaving the flame, which will emit the smell of burning paper, and what is left behind after burning is a small amount of gray-white ashes. When the wool burns, it smells like burning hair, and the ashes left behind after burning are black and crunchy, and when you press it, it will turn into a powder.

Although chemical fibers can also be burned in fire, the combustion speed is slow, and the form is melt shrinkage, and the residue after combustion is hard balls.

After burning, it is the synthetic fibers that are kneaded into a hard ball, the natural fibers that can be kneaded into powder, and then smelled, the wool that smells of burnt feathers is wool, and the cotton and linen that have no smell.

Combustion method ignition of chemical fibers has a special odor. Wool burns with the smell of burnt feathers.

Burning smells, wool after burning smells the same as human hair burning.

When burned with fire, wool will smell of burnt feathers, and chemical fiber will smell of plastic.

Simply use the combustion method, but also combine the microscope method to see the fiber cross-section.

If necessary, it must be dissolved with a solution.

1. The luster is different, most of the pure wool fabrics are soft and natural, and there are fewer bright colors; The polyester chemical fiber imitation wool fabric has a rich and bright color, and if you look closely in the sun, you will often see dazzling points of light.

2. The feel and elasticity are different. Pure wool fabric feels soft, smooth, boneless, when holding the fabric tightly by hand or shaking it with your hand, it has a sense of activation, slightly wrinkled but not hard, and the rebound is soft but not rigid. Although polyester imitation wool resembles wool in appearance, it feels soft and smooth, has no bones, has many folds, and has a slow rebound.

3. Burn it after drawing. After the pure wool fabric is drawn and rolled, you can see that the wool fiber thickness is uneven, the length is different, and the natural curl is natural; The polyester viscose wool imitation fabric fiber length and thickness are uniform.

After the pure hair is burned, the fire burns slowly, and the flame continues to burn, accompanied by the smell of the burnt hair, and there are more ashes, which are black and crunchy and lumpy, and are twisted by hand to become powder. The polyester imitation wool is close to the flame that ignites, burns quickly, the flame is yellow, accompanied by the smell of burning paper, and the ash has a white light ash that is easy to fly, and leaves a hard lump that is easy to crush.

The way to distinguish wool from polyester in life is to burn and smell the smell.

Analysis: wool and polyester belong to natural fibers and man-made fibers respectively when burning their smell is different, wool will appear burnt feather smell, which is also their essential difference, identify wool thread, synthetic fiber thread or cotton thread ignited, produce burnt feather odor, not easy to ball wool thread; Synthetic fiber threads that are odorless and easy to pill are made. When burning, it produces the smell of burning paper, and it is cotton thread that does not ball.

Common methods for identifying substances:

Physical methods: seeing, smelling, touching, dissolving, sucking" and other ways to identify. "See" is to see the color, state, shape, etc. of the substance, "smell" can smell the smell of certain gases, "touch" can feel whether there is a change in heat by touching the outer wall of the container, "dissolve" to see whether the substance can be dissolved, "suck" to see whether it can be attracted by magnets.

Chemical method: It is a common method to identify substances by the different phenomena produced by different substances when they have a chemical reaction with the same substance.

The easiest way is to quickly sweep the surface with a lighter, which will smell like burning hair in the case of wool and plastic in the case of polyester.

Burn it, all the chemical fiber materials are melted while burning, rolled into small balls, real wool or chemical fiber materials, take a few yarns and burn them to know.

One of the components of wool is protein, which produces a similar smell to burning hair when burned over fire.

Take a little bit to ignite the smell of wool fabric.

Because wool contains protein, it will smell when burned.

The chemical fiber is cellulose and has no odor when burned.

Very simple.

I know it by looking at the shape.

The chemical fiber is a black solid.

Wool turns gray at the touch of it.

Hope it helps!

The smell of chemical fiber is not very good when it is burned, and the smell of wool is the smell of your fever.