What is the method of bleachin g wool?
Wool could be bleached using two methods, namely, oxygen and reduction. Oxidative bleachers such as hydrogen dioxide and potassium permanganate could be used. The commonly used one was hydrogen dioxide. The hydrogen dioxide could break down new oxygen and destroy the organic coloring in the wool. It had the characteristics of good whiteness, long-lasting, and not easy to yellow, but it would cause certain damage to the wool. There were two methods of bleaching-dipping and steaming. The dipping and rinsing method was to soak the wool in a solution of hydrogen dioxide at a temperature of 50 ° C for 10 to 15 hours. The concentration of the rinsing solution was determined by the content of the dye in the fiber. The acid can be neutralized by the addition of a solution of either Na-SiO2-SiO3 or NH3-NH2. In addition, it could also be restored and bleached with insurance powder. The requirements were not high, and it would not damage the strength of the wool fiber. However, insurance powder may be difficult to buy in an individual or family.
Knitting method of wool cotton slippers
Based on context alone The following is the knitting method of wool cotton slippers: ** 1. Material preparation ** 1. Wool: Choose a suitable wool. The thickness depends on your personal preference. Generally, medium-thick wool is more suitable. 2. Sole: You can buy ready-made cotton slippers soles, or you can make your own soles with cardboard or multi-layered cloth. 3. Needle: Choose the appropriate type of needle according to the thickness of the yarn. ** 2. Weaving soles ** 1. needle raising - The number of stitches was based on the size of the sole. Usually, a small sample was first knitted to determine the relationship between the number of needles and the density of the yarn. For example, first pick up 10 needles, weave about 10 rows of small rectangular, measure its width, and then calculate the approximate number of needles needed according to the width of the sole. If the sole was 8 cm wide and the sample was 5 cm wide with 10 stitches, then about 16 stitches would be needed. 2. Woven soles - It is knitted with flat stitches (bottom stitches). It was woven to the length of the sole. This length was slightly shorter than the actual length of the sole because it had to be sewn with the upper and had a certain degree of elasticity. During the knitting process, you can add needles to make the sole have a certain curvature. For example, add a needle on each side of every few rows. ** 3. Knitting Vamps ** 1. needle raising - The number of stitches was determined by the circumference of the sole. Generally speaking, if the circumference of the sole was 30 centimeters, about 2 - 3 stitches per centimeter, then 60 - 90 stitches could be used. 2. Woven Vamp Pattern - The pattern could be knitted using a combination of upper and lower needles, such as a combination of 2 needles on top and 2 needles on the bottom. Repeat knitting would form a simple pattern. He could also weave some complicated patterns, such as twisted needles. When knitting the upper, the shape of the upper should be gradually formed. The middle part should be reduced appropriately, and the number of needles on both sides can be maintained or slowly added to match the shape of the foot. 3. shoe opening treatment - When the upper was woven to a suitable height, the opening could be processed. Generally, single-rib needles (1 needle on the needle, 1 needle under the needle alternate knitting) were used to knit the shoe opening, which would make the shoe opening elastic and more comfortable to wear. ** 4. Suturing ** 1. Then, he sewed the knitted upper and sole together. He could use yarn and sewing needles to sew the shoes. The number of stitches on the upper should be evenly matched with the edge of the sole, and then he could use yarn to sew them up one by one. 2. During the sewing process, pay attention to pulling the upper flat without wrinkles and ensure that the sewing is firm. "Prosperous Brocade Record" is equally exciting. Everyone is welcome to click and read it!
pearl bleachin
Blowing pearls was an optimized treatment method, and the commonly used bleacher was hydrogen peroxide-based. The hydrogen Peroxide-Blowing Method soaked the pearl in a solution of 2%-4% oxygen dioxide at a temperature of 20 - 30°C and a pH-value of 7 - 8. At the same time, it was exposed to sunlight or ultra-violet rays. After about 20 days or more of rinsing, the pearl would turn gray-white or silver-white, and when the effect was good, it could turn pure white. In addition, the rinsing method could also be used, but improper use could cause the pearl to become fragile and brittle, or leave a chalky powder surface, so this method was generally not used. Blowing the pearls could not completely turn the color groups white, so fluorescent brightening agents were often used to increase the whiteness and brightness of the pearls. The fluorescent brightening agent was a kind of fluorescent dye. It would have a fluorescent reaction under the purple light. It would absorb the invisible violet light in the sunlight and transform it into a visible purple-blue light, turning the pearl into white light.
Is bleachin 'harmful to the body?
Bleach is harmful to the human body. The main component of the bleacher was a strong disinfectant, which was corrosive to the skin and digestive system. Contact with bleaches can cause skin corrosion and burns, causing contact and peeling dermatitides. Eating bleaches by mistake could cause damage to the digestive system such as the esophagus and stomach, and even cause bleeding. The toxic components of the bleacher could also damage the liver and kidney function and even lead to failure. Wear a mask and gloves when using the bleacher, and dilute it before using it. Try to reduce exposure to bleaches and choose a mild shampoo to wash clothes to reduce damage to the skin.
Principle equation of NaClO bleachin
The principle equation of NaClO was 2NaClO+CO2+H2O= 2HClO + BaiduNhomakorabeaNa2CO3.
What does ECF bleachin 'mean?
EcF Blowing refers to the use of ClO2 to replace the use of Cl2 to significantly reduce the amount of organic compounds in the waste water. This technology was known as the elemental chloride-free (ECF) technology. However, since the ClO2 rinsing process would produce a small amount of elemental sulfur, strictly speaking, this was not an absolutely elemental sulfur free rinsing process.
Jade wool
Jade raw materials were the raw stones of jadeite, the most primitive state of jadeite after it was unearthed. It had not been polished or cut by any machine or hand. Its appearance was rough and irregular, retaining the most direct imprint of nature. It was difficult to tell whether the quality of the interior was good or bad. It was full of mystery and the price was relatively low. Experienced craftsmen could design and carve according to its internal texture and color distribution, or make it into various crafts such as beads. In Myanmar, the management of jade resources was strict. Only through the "public auction" could they be traded out of the country. The "public auction" of jade raw materials was a more unique and fair auction method. The public auction usually lasted about 10 days. When selecting jade raw materials, the connoisseur needed to delve into its color characteristics (deep green and pure flawless quality is often higher), carefully observe and identify the texture (high-quality jade texture should be delicate and tight, warm to the touch, and the texture should be clear and unique), consider the degree of clarity (the higher the degree of clarity, the higher the value) and other factors. The novel "Ledge" is equally exciting. Everyone is welcome to click and read it!
What are the characteristics of wool in wool sci fi novels?
In wool sci - fi novels, wool can often represent a connection to a more primitive or natural past. For example, in 'Wool', the wool might be used in the clothing of the characters, symbolizing a link to a time before the post - apocalyptic situation they are in.
How does wool play a role in wool science fiction?
In wool science fiction, wool can be used as a form of protection. For example, the characters might weave thick woolen garments to protect themselves from harsh alien environments.
rock wool board
Rock wool board was a kind of organic fiber board, which was mainly made of granite and melted at a high temperature. It has the characteristics of light weight, small thermal conductivity, heat absorption, non-combustion and so on. Rock wool boards are widely used in electric power transportation, petrification, textile and smelting, construction and agriculture, etc. In terms of construction, rock wool boards can be used for exterior walls, roofs, partition walls, curtain walls, and other building structures. They are also suitable for industrial use, such as the electric heating industry, nuclear power plants, and so on. Rock wool board had the functions of fire resistance, heat insulation, sound absorption, etc. It was an energy-saving and environmental protection material.
Author: Wool Doudou
Wool Doudou was a very outstanding novelist. His works included " I am the Executioner "," Paper Man "," Souls Return to the Unfinished Building ", and " City: Divine Refiner ". The plots of these novels were full of ups and downs, exciting and exciting, and the plots and writing style were excellent. Wool Doudou's novel style was unique and full of imagination, which was very popular among readers. Among them, Wei Dabiao and Wang Caiqin in I am the Executioner were the most attractive characters. In addition, Wool Doudou also wrote a horror novel," Blue and White Porcelain." These works were wonderful reading choices.