The purpose of the project was to establish stages and identify the process of the transformation of earthenware by analyzing the shape of vessels around relics excavated in Gyeongnam Province. The period is from the 8th to 13th centuries, and from the late Unified Silla period to the mid-Goryo period. There are 45 sites in total, 23 sites for living, 15 sites for tombs, two for production, and five for living and tombs to coexist. 410 pieces of earthenware extracted from this were selected. The types of the bowl were a mounted dish(高杯), a mounted bowl(臺附碗), whan(碗), jars(壺), bottle(甁), etc. and they were analyzed again through attribute extraction and formatted. Each type of bowl was divided into detailed deformities according to the ratio of bowl's height(器高) and mouth diameter(口徑), the ratio of Its part of the dish(杯身) and the mounted bowl-shaped legs(臺脚), the form of lips of a bowl(口緣) and body of vessel(胴體), and the form of the mounted bowl-shaped legs(臺脚).
A mounted dish had a greater the mounted bowl-shaped legs's ratio is less than 1. and As the mounted bowl-shaped legs change from the opening(透窓) to hole(透孔), the opening slowly disappeared and changed into unopened forms. As the lid jaw gradually disappears from the late 7th century to the 8th century, the lid jaw gradually disappears and appears to have completely disappeared in the first half of the 9th century at the latest. A mounted bowl is the changes in the deformity and stamped designs are linked to each other. The deformity was changed from the erect-mouth to the out-mouth. As shown in 宮川禎一'suggestion, the pattern of continuous vertical axis(縱長連續紋) was carried out the stamped pattern by C method from A method. Two kinds of thick lines disappeared in the body of the bowl, the cut of bowl's side changes forms thick and bowl's lips round finish.
Wan is a relatively early period in which the form of bowl's lips is horizontally leaning outward, and it appears in the late period that it takes place in the form of Its part of the dish similar to a mounted bowl, and has a one-year relationship. Most of the wan were excavated from the living relics and were divided into large and small pieces with a ratio of 0.5:1 or less and a diameter of 15.0 centimeters or less.
Jars were classified according to the ratio of bowl's height(器高) and mouth diameter(口徑), the forms of neck diameter(頸部). And there were divided into big jar(大壺), long-trunk jars(長同壺), short-necked jars(短頸壺), and small jars(小壺). In particular, small jar(小壺) also included elected jar with legs(臺部直口壺) and small pottery(小甕) with bowl's height of 5.5cm or less. Most of them were used for living relics, and some of them were buried by small jar and pottery with handle. jar with short nect and small jar also account for a large portion of the living relics because they are easily used in everyday life.
Bottles were divided into the shape of deformities according to bowl's height, maxillary diameter of vessel, the form of lips of a bowl(口緣) and body of vessel. position of maxillary diameter of vessel. bowl's height are 15cm or more and according to the form of lips of a bowl(口緣) and body of vessel, classified into a bottle with one side pressed(扁口甁), hemispherical bottle(盤口甁), Maebyoeng(梅甁), palgu bottles(叭口甁), etc. and only 15cm or less are classified as small bottle.
The phase-by-step timing of these types was divided into four stages. The phase I a period of decline of a mounted dish and a fashionable period of a mounted bowl, phase II the extinction period of a mounted dish and a period of decline of a mounted bowl, phase III the extinction period of a mounted bowl, phase IV the extinction period of wan and bowl.