The black talc in Guangfeng is a Sinian sedimental-metamorphic transformation type deposit, and its mineralization process is divided into three stages.

The two major mining belts in the north and south of Guangfeng have ore bodies that extend intermittently for about 20 kilometers. The prospective resource reserves exceed 1 billion tons, and the proven reserves exceed 200 million tons. It ranks first in the world in terms of reserves and quality.

Ultrafine black talc powder, characteristics: black, ultrafine, high reinforcing, large specific surface area, strong light-blocking property; Application: Black plastic masterbatch, rubber reinforcement, anti-corrosion coating, ink, asphalt modification, waterproof material.

Microscopic mineral structure, crystal morphology: fine flaky, nanoscale plate-like structure, with small flake diameters and complete lamellar layers. Structural features: The sheet-like surface is coated with a graphite-based organic carbon film, featuring a large specific surface area and high surface activity.