The craft of making red silk inkstone refers to the craft of making red silk stone inkstone by using the raw materials of red silk stone to examine and create. Red silk stone is only distributed in Heishan, Qingzhou and Laoyagou, Linqu. It is a stone with hair like silk, color like sunset, and silk like chicken blood, so it is called red silk stone. Red silk stone has moderate hardness, rich texture, and obvious color contrast. The inkstone made of red silk stone is "fine and smooth like jade, warm and tender but not slippery, with sound when knocked, no loss of water, no damage to the ink, and no loss of the pen tip after long use", and is praised by literati and poets of all dynasties as "the first famous inkstone". The craft of making red silk inkstone is roughly divided into four processes: design, cutting, carving, and waxing. First, according to different textures, different colors, and the density and distribution of textures, design a pattern of making inkstone suitable for a certain shape. Secondly, cutting materials, the inkstone is not about size but about fineness, and the use of texture and color is just right, so take what is needed for the intention, and cut off the rest, and never be greedy for size and superfluousness, which will affect the shape. As for carving, the traditional carving technique of Hongsi inkstone is mainly based on the pursuit of meaning. When cutting, the lines are bold and majestic, and the artistic conception is reflected with simple knife techniques. Therefore, the carving techniques of Hongsi inkstone are mainly line carving and shallow relief, and openwork carving is rarely used. Finally, waxing is applied to make it shiny. Waxing takes more than ten days and more than ten processes such as fine grinding, cold rubbing, hot rubbing, waxing, and polishing, so that it can increase the brightness and make the texture clearer without affecting the use.