Regarding the production of purple sand ribbed ware, the public generally believes that its complex ribbed structure can only be completed by hand. But in fact, there is not only one way to make a ribbed machine. Grouting and semi-handmade are also possible. To discern whether a ribbed vessel is fully handmade, we need to have an in-depth understanding of the various production processes. For example, the mud used in the grouting method is usually very delicate, so if the walls of a ribbed vessel are very delicate to the touch and lack a noticeable sand feel, then the pot is likely to be made by the grout method. On the other hand, if the sand feeling is strong, then the pot can be ruled out as a grout method, and then it is necessary to further judge whether it is semi-handmade.
The main difference between semi-manual and fully manual is whether or not a mold is used in the molding process. For novices, it can be difficult to identify the marks, as some craftsmen deliberately repair them. However, there are other ways to tell how the ribbed is made. Due to the complexity of the shape of the ribbed, it is difficult to ensure that the size and curvature of each rib are exactly the same when making them all by hand. Only a very skilled craftsman and a great deal of time to carefully correct it can achieve this perfect symmetry.
In contrast, semi-hand-formed ribbed ware makes it easier to achieve symmetry and perfection of the shape due to the use of molds. Therefore, if the ** of a ribbed device is not high, but its shape is very perfect and symmetrical, then it is likely to be semi-handmade. On the contrary, if each rib is different, or even has a certain deviation, it can basically be judged that it is all handmade.
To sum up, we can judge the production method by observing the sand feeling, touch, symmetry of the ribs and the first and other aspects of the ribbed device. These characteristics can help us more accurately judge the production method of purple sand ribbed ware.