｛XingHe JiaoYe Qin｝-progress1225

2021-12-25

Rough coating scraping for Jiaoye Qin

The lacquer-mixture coating of the Guqin is used to improve the weather resistance, surface strength and touch or playing feel correction of its wooden structure. Otherwise; this step can also be used as one of the operations for reverse adjustment of the Guqin tone and timbre.

The smoothness of the lacquer-mixture layer on Qin surface is based on the uniformity of the previous cloth wrapping step and the reasonable arrangement of the actual scraping area. The lacquer mixture coating and scraping process is divided into three steps: thickness increasing of crushed antler granule, rough surfaces filling of medium pulverization, and smoothing fill up with lacquer-pulverization mixture. Since ancient times, its coating operations may derived from four type: brushing, scraping, pinching, and sticking.

The traditional lacquer-mixture coating and scraping operation selects antler granule after degreasing, degumming, crushing, and layer sieving, or adds shells, colored ores, gemstones and other mixtures of different specific density and stiffness.

The lacquer-mixture thickening coating and scraping needs to pay attention to its solid content. In addition, due to the cross-linking curing reaction of natural lacquer, it needs suitable oxygen and humidity environment. Then it is necessary to take into account the thickness increasing of particles and the conditions requirement of curing reaction during the operating process. Then the next step of calibration grinding and rough surface filling is then carried out after cures.