What are the washing methods for jeans?

1. General washing is ordinary washing.

It is just changing the washing we are familiar with to mechanized. The water temperature is about 60°-90°C. Add a certain amount of detergent. After about 15 minutes of ordinary washing, rinse with clean water and add softener to make the fabric softer and more comfortable, and visually more natural and cleaner. Usually, according to the length of washing time and the amount of chemicals used, general washing can be divided into light general washing, general washing, and heavy general washing. Usually, light general washing takes about 5 minutes, general washing takes about 15 minutes, and heavy general washing takes about 30 minutes (this time is not accurate). There is no obvious boundary between these three washing methods.

2. STONE WASH

That is, add a certain size of pumice stone to the washing water to grind the pumice stone with the clothes. The water level in the grinding tank is at a low water level where the clothes are completely soaked, so that the pumice stone can contact the clothes well. General washing or rinsing can be done before stone grinding, or after stone grinding. According to different requirements of customers, yellow stone, white stone, AAA stone, artificial stone, rubber ball, etc. can be used for washing to achieve different washing effects. After washing, the cloth surface will appear gray and old, and the clothes will be slightly to severely damaged.

3. ENZYME WASH

This is a cellulase, which can degrade the fiber structure at a certain pH value and temperature, so that the cloth surface can fade and remove hair more gently (produce a "peach skin" effect), and obtain a lasting soft effect. It can be used with or instead of stone. If used with stone, it is usually called enzyme stone washing.

4. SAND WASH

Sand washing uses more alkaline and oxidizing additives to make the clothes have a certain fading effect and old feeling after washing. If it is matched with stone grinding, a layer of soft frosty white fluff will be produced on the surface of the cloth after washing. Adding some softener can make the fabric soft and soft after washing, thereby improving the comfort of wearing.

5. CHEMICAL WASH

Chemical washing mainly achieves the purpose of fading by using strong alkaline additives (NaOH, NaSiO3, etc.). After washing, the clothes have a more obvious old feeling. If softener is added, the clothes will have a soft and plump effect. If stones are added to chemical washing, it is called CHEMICAL STONE WASH, which can enhance the fading and wear effects, so that the clothes have a strong sense of oldness. Stone washing combines the effects of chemical washing and stone washing. After washing, it can achieve an effect of imitation and fluffing.

6. BLEACH WASH

In order to make the clothes have a white or bright appearance and a soft feel, the clothes need to be rinsed, that is, after ordinary washing with clean water, heat it to 60°C, add an appropriate amount of bleaching agent according to the depth of the bleaching color, and make the color consistent within 7-10 minutes. During operation, the direction of adding bleaching agent should be consistent with the direction of the rotating cylinder to prevent the bleaching agent from falling directly on the clothes due to failure to dilute with water as soon as possible, resulting in local bleaching.

Before bleaching, the water level in the tank should be slightly higher to dilute the bleach. After the clothes are bleached, the residual bleach in the water is neutralized with baking soda (Na2CO3, NaHCO3) to completely stop bleaching. After the water is clear, add detergent, fluorescent brightener, hydrogen peroxide, etc. at 50°C water temperature for the final washing, neutralize the pH value, fluorescent whitening, etc., and finally soften it. Rinse can be divided into oxygen bleaching and chlorine bleaching. Oxygen bleaching uses the oxidation of hydrogen peroxide at a certain pH value and temperature to destroy the dye structure, thereby achieving the purpose of fading and whitening. Generally, the bleached cloth surface will be slightly reddish. Chlorine bleaching uses the oxidation of sodium hypochlorite to destroy the dye structure, thereby achieving the purpose of fading. Chlorine bleaching has a rough fading effect and is mostly used for rinsing indigo denim.

After bleaching, the residual chlorine in the water and clothes should be neutralized with seawater to stop bleaching. Stone grinding after bleaching is called BLEACH STONE.

7. Destruction Washing (DESTROY WASH)

After the ready-made clothes are polished with pumice and treated with additives, some parts (bone position, collar angle, etc.) will be damaged to a certain extent. After washing, the clothes will have a more obvious old effect.

8. Snowflake Washing

Soak the dry pumice with potassium permanganate solution, and then directly polish it with clothes in a special rotating cylinder. The pumice is polished on the clothes, so that the potassium permanganate oxidizes the friction points, making the cloth surface irregularly faded and forming white spots similar to snowflakes.

The general process of snowflake washing is as follows: soaking pumice with potassium permanganate - dry grinding of pumice and clothes - snowflake effect board - take out the clothes and wash the stone dust on the clothes with clean water in the washing water tank - neutralization with oxalic acid - washing - softener. 9. MOUSTACHE EFFECT

It is also called WHISKER, but WHISKER is more professional. Cat whiskers are a kind of hand sand (hand rub, HAND BRUSH), which is just ground into the shape of cat whiskers.

10. SPRAY STONE WASH / SAND BLAST

It is to use special equipment (in a figurative sense, it is a large electric toothbrush, but it is a roller type) to polish the fabric, usually with an inflatable model.

11. MONKEY WASH

The essential difference between it and sandblasting is that the former is a chemical action, while the latter is a physical action. Monkey wash spraying is to use a spray gun to spray potassium permanganate solution onto the clothing according to the design requirements, and a chemical reaction occurs to fade the fabric. The concentration and spray amount of potassium permanganate are used to control the degree of fading. In terms of effect, monkey wash spraying fades evenly, the surface and inner layers fade, and it can achieve a strong fading effect. Sandblasting only fades on the surface, and physical damage to the fiber can be seen.

12. Pigment wash / pigment dyed wash

Also called "single-sided coating / pigment dyeing", this means that this washing method is specially designed for clothing that has been dyed with pigments. Its function is to consolidate the original bright color and increase the softness of the hand feel.

If you want to know more details about demin washing ,please contact us :info@tiankunchemical.com