BJD is the English abbreviation of Ball-jointed Doll, and the Chinese is "ball-jointed humanoid". Generally refers to various exquisite movable figures (dolls) with ball joints. BJD originated in Europe, was once popular in Russia, and was later introduced to Japan, South Korea and China.

Today it is mainly produced in East Asian countries and regions (such as South Korea, Japan, and Taiwan, China). Basic introduction Chinese name: Ball-jointed Doll Foreign name: BJD (Ball-jointed Doll) Attributes: A movable humanoid with ball joints Origin: European BJD origin, structure, plasticity, weight, maintenance, The origin of BJD is because the key parts are equipped with balls The shaped joints enable the humanoid to make many poses that are close to real people. Materials such as plaster, ceramics, wood and plastic can be used to make the humanoid. What we usually call BJD mainly refers to a spherical joint humanoid made of resin. It adopts the structural theory of ball joints. The limbs, torso and each joint are made of resin, with a delicate feel. Each component is a rubber band/S hook. /Thick cotton rope/aluminum wire and other materials are fixed together. Each joint can be flexibly assumed into various poses.

Tips: V’s DD and OB’s bodies use the principles of runner joints and mechanical joints, and are made of high-grade plastic or PVC resin. The inside of the body is a structure, which is not a type of BJD.

It is worth mentioning that the founder of BJD is Master Enku Akihiro of Japan Volks Club. The SD doll developed by Volks is not only the pioneering work of BJD, but also the standard and model for all future BJD products. Nowadays, all Korean and Japanese BJD dolls are based on the size and basic body shape of SD dolls. SD dolls are absolutely authoritative in many doll manufacturing technologies. So much so that when BJD is mentioned nowadays, it is said to be SD doll, but SD is just a type of BJD

Since 1998, the Japanese "Style Village" company began to use cheaper polyurethane resin for dolls. Using materials, he mass-produced a spherical-jointed doll called "Super Dollfie", which sparked a trend of collecting dolls. The emergence of Super Dollfie revolutionized the market, especially in South Korea. The first Korean companies established were HAPPYDOLL, LUTS, DOD and ANGELREGION. In 2003, a humanoid fashion design company with single spherical body joints appeared in Hong Kong, DOLLHEART. Since 2003, many manufacturers of spherical jointed figures have appeared. Since 2005, toy manufacturers in mainland China, Hong Kong and other places have also begun to produce such figures. With the rise of the collection trend, sphere-jointed figures have gradually become a part of popular culture and frequently appear in many film and television works. For example, the Japanese animated film "Ghost in the Shell 2 INNOCENCE" released in 2004 is based on spherical jointed human figures. To commemorate the release of the animated film, its director Mamoru Oshii held an exhibition of spherical-jointed humanoids in Tokyo[2]. The horror film "The Humanoid", released in South Korea in the same year, reflected the fear of some humans towards highly anthropomorphic entities such as sphere-jointed humanoids. Fans of articulated figures gradually formed an independent community. In 2006, the fashion design company Dollheart held Dolli*** Plus (DP), the first cross-strait and three-place exhibition with the theme of spherical jointed human figures. Today, in addition to personal collections, spherical jointed human figures are used in practical applications. , is also active in the design world. Because the human form has rich posture changes and the common joints are replaceable, it is suitable for art fields that require beauty and image such as painting, hairstyle, clothing, or makeup (but because it is expensive, it is usually They are all used privately by senior designers and are not easily seen in public). In life, there are also gatherings of babies and girls - called baby gatherings for short. They bring their babies together to take pictures and chat.

DP is held every year in every province and city, and girls from all over the world hold a baby exhibition similar to a comic exhibition. It is a huge scale, where you can buy baby products and appreciate the beautiful dolls up close! The structure adopts the structural theory of ball joints. The limbs, trunk and each joint are made of a high-grade synthetic resin, which feels very delicate! And each component is fixed together by 1-2 special ropes (baby rings are called tendons)! Each part can be converted at will! And each joint can be flexibly put into various poses! Plasticity BJD has high plasticity. As long as the makeup, wig, eyeballs, baby clothes, etc. are slightly changed, the doll will have a big change! Even from a boy to a girl. The height of bjd is calculated in "minutes". Divide 180cm by Approximate height 1/2 measurements on paper: AOD's two-cent doll is 90cm, Oni Ningyo's two-cent doll is 75-77cm. Uncle size: The height is above 70cm, and some can reach 80cm or even 90cm. They are called 80s and 20s. 1/3 doll (3 points): The height is about 60cm. Generally, male dolls are taller than female dolls, and various companies There is a certain difference in the height of the dolls. 1/4 doll (4 points): height between 42cm~45cm. There are differences, mainly between companies. Sometimes there is a slight height difference between boys and girls. 1/6 doll (6 points): Height is around 30cm: 30cm (Lati Green), around 26cm (V YOSD, most BB babies) 1/8 doll (8 points): Height is around 22cm 1/12 doll (12 points) ): Height is about 15cm. Because the specific circumstances of each baby are different, there are more detailed sizes such as sd17, sd13 and so on. The height of 17 men is 67cm, head circumference 23cm, hand length 22.7cm, chest circumference 27.8cm, waist circumference 20.8cm, hip circumference 27cm, leg length 33cm, and foot length 8.2cm. Usually wear 16mm eyes, if the eye socket is big enough, wear 18mm. SD17 is an awkward body between 3 points and uncle. The size is for reference only, please refer to the actual situation for details. Weight: A 1/4 baby weighs about 2-3 pounds, and a 1/3 baby weighs about 4-6 pounds. They are very heavy and have a strong presence! Maintenance 1. Make sure the space where the BJD is located is dry and clean. If it is usually stored in the closet, please place a moisture-proof agent or bamboo charcoal bag in the closet. 2. Try not to let the BJD's body come into contact with moisture. If it has to be done due to shooting needs, If it comes into contact with water, the doll must be completely air-dried before being put away. Avoid the S hooks and magnets in the doll's body from rusting due to moisture. 3. Please try to choose light colors for all close-fitting clothing such as trousers, vests, etc., such as flesh color, pink, white, etc. Please do not choose dark colors such as black or dark blue to avoid color fading from clothing and staining the doll. 4. Wear a mask on the doll every time you put it in your bag or sleeping box to prevent the makeup from being damaged by friction or the eyelashes from being crushed. 5. Try not to turn on the flash when taking pictures of your baby. It is said that it will accelerate yellowing. However, the flash effect is a bit scary, so it is generally not turned on. Yellowing needs to be confirmed. 6. When going out on location, try to avoid direct exposure of strong light to the doll. 7. In order to reduce yellowing, you can spray matte all over the body. The disadvantage is that it is easy to get dirty. After yellowing, the yellowing can be removed by polishing the whole body, but this will make the resin on the baby body thinner. 8. When there are naughty children at home, try to avoid direct contact with the naughty children. The best way is to lock them in a cabinet to avoid irreversible and unnecessary losses.