Black SiC F600 Polishing Powder for Jade Tumbling Grinding
Black SiC F600 polishing powder (particle size about 13–14 μm) is a high-performance fine silicon carbide powder for jade tumbling grinding. It is especially suitable for the finishing and lightening in the jade processing process. It can balance processing efficiency and surface finish, and is widely used in the batch tumbling of various jade materials such as jadeite, nephrite, and agate. Its core advantages and application characteristics are as follows:
1. High hardness and sharp cutting edges, efficient removal of fine scratches.
The Mohs hardness of black SiC is as high as 9.15–9.2. That is significantly higher than that of most jade materials (jadeite ~6.5–7, nephrite ~6–6.5). The F600 fine-grained abrasive has sharp crystal edges and corners. In the tumbling process, it produces gentle friction and micro-cutting with the jade surface through the tumbling motion of the barrel. It can efficiently remove the coarse grinding marks left by the previous coarse-grained abrasives (such as 16-mesh and 24-mesh brown corundum), reduce the surface roughness of jade, and lay a flat and smooth foundation for the subsequent mirror polishing.
2. Brittle material properties, self-sharpening ensures stable polishing quality.
Black SiC is a typical brittle abrasive. During the tumbling process, the abrasive particles will undergo micro-fracture under slight impact, and new sharp cutting edges continuously exposed, which is called the “self-sharpening” property. This characteristic avoids the phenomenon of “slip polishing” caused by the wear and rounding of abrasive particles, ensures that the polishing efficiency remains stable throughout the batch processing, and makes the surface finish of multiple jade workpieces consistent, which is suitable for industrial batch tumbling production.
3. Chemical inertness, no pollution to jade surface.
The main component of black SiC is high-purity silicon carbide, which has strong chemical stability. It will not react with the main components of jade (such as silicate, aluminosilicate) in the tumbling process, and will not precipitate colored impurities. For high-value jade materials such as light-colored nephrite and transparent jadeite, it can avoid surface discoloration, staining and other problems.
4. Good dispersibility, adaptable to multiple tumbling media.
F600 black SiC polishing powder can uniformly dispers in water, alcohol or special polishing liquid media. It is compatible with common tumbling equipment such as rotary tumblers and vibratory tumblers.
5. Cost-effective, balanced performance and processing cost.
Compared with superhard abrasives such as diamond micro-powder (which is suitable for the final mirror polishing of jade), black SiC F600 polishing powder has obvious price advantages, and the fine-grained abrasives have high reuse rate. It can replace part of the application scenarios of diamond micro-powder in the fine polishing stage of jade, effectively reducing the overall processing cost on the premise of meeting the surface finish requirements of medium and high-grade jade.
Key Application Notes
1. Process matching: F600 black SiC is only suitable for the fine polishing stage of jade. It needs to work in conjunction with coarse-grained abrasives (such as brown corundum 24/40 mesh) and subsequent super-fine abrasives (such as F1000 SiC or cerium oxide micro-powder) to achieve the mirror effect of jade surface.
2. Dosage control: In tumbling processing, the dosage of F600 polishing powder should be controlled at 3–5% of the total mass of the medium (adjust according to the type of jade and the size of the workpiece). Excessive dosage will cause abrasive agglomeration and secondary scratches.
3. Workpiece protection: For jade workpieces with complex shapes or thin edges, it is recommended to add filler media (such as plastic pellets, wood chips) during tumbling to reduce collision damage and ensure uniform polishing of the surface.
