Who can provide details of chalk crayons and oil sticks?

Painting Stick<br> Maybe for those who are not studying art, the word "painting stick" is not too well known, in the daily works of some painters from time to time will appear in this expression, at the same time, the oil painting stick is also the children like to use for painting tools. <br><br> Oil pastels look like crayons, but they are not crayons. <br><br> oil stick feel delicate, smooth, spreading good, stacking color, color mixing performance is excellent. The most prominent ultra-fine thickening coating material, make the coating more texture, coating weight 0.002g/cm2. can fully show the effect of oil painting, to meet the needs of a variety of painting skills difficulty. Ultra-low temperature ammonia freezing, so that the pressure density is greater, the molecular structure of the rod body is more compact, the weight of a single stick is about 8.5g. Fracture resistance is not less than 4N, more difficult to break, not easy to loss. <br><br> oil painting stick variety, brand has domestic, imported; color 12 colors, 16 colors, 25 colors, 50 colors; models have popular, medium and coarse, and so on. <br><br>Oil painting stick production steps: <br><br> (1) with turpentine melting paraffin wax, with the production of saponification of wax; <br> <br> <br> (2) paraffin wax liquid + the appropriate amount of linseed oil + a number of pigment pigment powder. The method of making is the same as for pigmented chalk. The ratio of color pigment powder to wax oil liquid depends on the degree of oil absorption of the color pigment powder. <br><br> Note: <br><br> (1) pyruvic resin: chemical stores are available <br><br> (2) raw flaxseed oil: China said the green oil, is to do a variety of varnish raw materials, chemical stores are available <br><br> (3) Osmanthus fragrans oil: generally used as dental medicine material <br><br> (4) emulsified wax: milky white, opaque, like yogurt flavor, so called emulsified wax <br><br> at the same time, in the use of the oil painting stick should also pay attention to, especially for the children; <br><br> Reminder: oil painting stick use "three nots Stick use "three not"<br><br>1. Do not place in the sun or high temperature environment. Oil stick in the high temperature environment is easy to soften. <br><br>2. Do not place next to flammable objects. <br><br>3. Do not allow children to swallow, remember to wash your hands after painting. <br><br>Reasons to like the oil paint stick <br><br>Gu Zhongxiang Art Teacher (Luwan District Children's Palace)<br><br><br>Generally speaking, kindergarteners are more suitable to use the oil paint stick, because it is softer, sufficiently oily, and has a large area to paint, which is more convenient for children to use. . Crayons and watercolors have a small coloring area and are easy to break or break the nibs by children who "don't know what's important". <br><br> Oil stick is a stick-shaped paint material made from a special mixture of paint, oil and wax. It is very easy to use and the child can draw directly on the painting or enrich it with techniques such as mixing colors, layering, scraping and layering. Unlike oil paints and watercolors, oil sticks are solid paints that do not require all the preparatory work of mixing or blending. As soon as the urge to paint arises, the child can start creating immediately. <br><br>For 3- to 7-year-olds, 16- to 25-color sticks are sufficient. Because generally a box of oil stick color will be divided into red, yellow, blue, green four color system. Red will be divided into red, purple, pink, etc., the yellow system is divided into orange, orange, lemon yellow, etc., the blue system is divided into blue, lake blue, cobalt blue, etc., the green system is divided into grass green, dark green, olive green, etc. 16 colors to 25 colors of color choices for the average child is basically enough, especially just learn to paint the children. <br><br> Generally speaking, children's favorite colors are simple and distinctive, these colors are beneficial to the naive children to cultivate optimism and enterprising, and to develop the psychological quality of honesty and purity, lively character. So we will find a box of oil stick, the child is often the first to use up the color of lemon yellow, orange, lake blue, green and other bright colors. Some brands of oil stick can be zero with a single color, so you do not have to buy a box of a box, resulting in some colors are always left a lot of colors, some colors all of a sudden run out of the imbalance phenomenon. <br><br> then again is the oil stick also brings some disadvantages: oil stick is commonly used art supplies. But the oil painting stick raw materials contain a certain amount of soluble heavy metal elements, such as lead, barium, chromium, antimony, cadmium, mercury, arsenic, etc., unknowingly intake of these heavy metal elements to a certain extent will be harmful to the human body. China Consumers Association has 19 brands of oil painting stick samples sold on the market in Beijing, commissioned the National Light Industry Sporting Goods Quality Supervision and Testing Center, the sample of seven heavy metal elements such as antimony, arsenic, barium, chromium, cadmium, lead, mercury, etc., the content and product labeling for testing and comparison. <br><br> The results show that China's toy safety standards for children's pigments, the above seven heavy metal elements and their compounds content limits with the European **** body of toy safety standards, compared to some of the requirements are too low. Behind the beautiful colors there are killers, dyes are the main components of the oil stick, oil stick in the heavy metals mainly from the addition of inorganic dyes, that is, natural ores. Antimony, arsenic, barium, chromium, cadmium, lead, mercury and other heavy metal elements in these ores, when excessive amounts are ingested into the body, will cause heavy metal poisoning. Some of the compounds of arsenic are known carcinogens, causing skin, lung and digestive cancers. All water-soluble compounds of barium are toxic, and symptoms of poisoning include muscle twitching, high blood pressure, cramps, and kidney damage. <br><br> So how do you pick a safe-to-use paint stick on the market? <br><br>Oil Painting Stick Demystified <br><br>Lei Zhen Art Director (Shanghai Cherry Blossom Cultural Products Co., Ltd.)<br><br>Oil Painting Stick is made up of non-drying oils, pigments, calcium carbonate and soft waxes. It has excellent softness and strong adhesion. Oil painting stick was introduced into the country, due to the convenience and ease of use, the performance effect is outstanding, now the oil painting stick has become the main material for children's painting, but at the same time the market oil painting stick a variety of kinds, the quality of the good and bad, to the consumer's purchase brings a lot of inconvenience. With the expanding demand, the production of similar products is increasing, some of these low-quality products can be identified at a glance from the rough appearance, and some other use of the color is still available from the appearance of difficult to distinguish good and bad, in fact, the biggest danger of poor-quality products is that the harmful substances exceeded the standard, experiments have proved that: the oil stick pigments and rolled paper containing arsenic (As), barium (Ba), lead (Pb), mercury (Hg) and other elements, such as The above substances exceed the standard, children use for a long time will cause chronic poisoning. <br><br> If parents are greedy for cheap from the stalls or from irregular channels to buy the quality of unqualified oil painting stick will increase the chance of lead poisoning. Some people also like to tear off the paper skin of the oil stick, take the stick body directly for painting, do not know that if you do this, if you do not wash your hands before meals, you will eat the lead into the mouth. Once the body too much accumulation will produce harm. <br><br> So in the purchase of oil paint stick when you must go to the regular shopping mall stationery counter or stationery store, choose some brand reputation is better oil paint stick. Because some well-known brands of oil painting stick in line with the oil painting stick industry standards, the safety of children's use of pigments, the content of harmful substances have strict control. <br><br>Purchase of oil stick code <br><br>1. Some cities in China's children's blood lead content has reached the level of toxicity, which is not lacking in the use of high lead content of painting supplies. For the sake of children's healthy growth, children should use safe and hygienic painting utensils. <br><br>2. In the purchase of oil stick, should be to the regular shopping malls or art supplies stores to buy, do not want to cheap, wholesale market product quality is sometimes difficult to guarantee. <br><br>3. Select the oil stick when the attention of its packaging logo is complete, with or without the product name, manufacturer's address, with or without the safety mark, etc., at present the main safety mark "CE" "CP" two. <br><br>4. See the oil painting stick with or without warning, applicable age group labeling. <br><br>5. oil painting stick for children to use, which contains heavy metal elements, so they should develop good hygiene habits, in the use of the hands should be washed in a timely manner, so as not to eat when the heavy metals into the body, endangering health. <br><br> Oil stick is also one of the tools that is easy to get started with, it is by no means without revelation to the oil painting technique, and how can an artist be strong enough to resist this temptation? <br> <br> Crayon<br> <br> crayon<br> <br> A drawing made with crayon (made by fusing and solidifying wax liquid and pigment) on paper, canvas, or plate. Crayon has no permeability, is fixed on the screen by adhesion, is not suitable for too smooth paper, board, and can not be repeated through the superimposition of colors to seek a composite color. However, through light rubbing or thick painting and color contrast between colors, crayon painting can also receive a rich and bright, calm and solid artistic effect. In addition, crayon drawing can be directly modeled through freely mastered thick and thin strokes, producing highly generalized artistic images with a special sense of childish beauty. It is an ideal tool for children to learn color painting, and some painters use it for sketching and color recording. <br><br>Hot wax oil painting, also known as wax painting (Emcaustic) is an ancient painting technique in Europe, the fourth century BC in Greece has appeared; China's Qin and Han Dynasty batik is also a kind of wax painting method. In the Louvre in Paris and the British Museum in London, there are well-preserved around the second century A.D. wax painted Egyptian pretty, after more than 2,000 years of color and surface are well-preserved, unlike oil paintings have shedding, discoloration, cracking of the worry; Kebut people with wax paintings painted shroud, although the base of the linen has become a fragment of the local color is still very good, amazing. This technique has been lost in the Middle Ages, until the nineteenth century some Romantic painters only re-examined the wax painting materials, such as painting the "island of the dead" famous Swiss painter Bocklin (AroldBocklin1827-1901), many of his works are painted using wax color. Modern painters such as Picasso also used wax painting method to complete the works. The main ingredients of hot wax oil painting are beeswax, oil painting color and strong solidifying agent, which solves the problems of discoloration, cracking and peeling of oil paintings over the years. Hot wax oil painting works of art do not change color, do not crack, do not fall off, can be preserved for a long time, never change color, and always maintain the artistic effect of the work. However, due to the drawing of materials, techniques require complexity, must make their own materials, at present the domestic specializing in hot wax oil painting research and creation of very few people. <br> pastel<br> pastel<br> <br> <br> with special color chalk in the strong adhesion of the paper drawn into the painting. Also known as pastel, color chalk painting. Characterized by opaque, non-glossy, and easy to grasp, through the rubbing rubbing, can produce fresh and bright, rich and delicate color effects, can express the complex atmosphere of the environment; can also be finely carved image of the texture of the texture. Chalk painting has a long history in Europe. As far as in the 16th century, L. da Vinci and others began to use it, and in the 17th century, it was popularized to all European countries and became an independent type of painting, and in the 18th century, it was unprecedentedly prosperous. Impressionist painters have pushed chalk painting to a new stage, giving full play to the artistic expression of chalk painting.