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Talcum powder is a layered silicate mineral consisting of water-bearing magnesium silicate (chemical formula Mg3Si4O102) from talc with a variety of excellent physical and chemical properties. It usually appears as a colorless transparent or white powder with low hardness (hardness 1), specific gravity between 2.7 and 2.8, lubricity, refractoriness, acid resistance, insulating properties, as well as a high melting point and chemical stability.

Talc has a wide range of applications in several industries, including coatings, plastics, paper, rubber, cables, inks and ceramics. In coatings, talc can be used as a backbone to improve paint film hardness, increase product stability and reduce costs. In plastic products, it improves molding shrinkage, surface hardness and processing fluidity, and increases heat resistance. In addition, talc in the paper industry can improve filler retention and paper opacity, smoothness and printability.

Metamorphic powder, also known as sodium sulfate (Na2SO4), is a white, odorless, bitter-tasting crystal or powder with hygroscopic properties. It is mainly used in industry to manufacture water glass, glass, enamel, pulp, cooling mixer, detergent, desiccant, dye diluent, analytical chemical reagent, pharmaceuticals, feed and so on. In the field of medicine, Yuanming powder has the effect of laxative heat and laxative, moistening dryness and softening hardness, eliminating swelling and dispersing knots, and belongs to the category of traditional Chinese medicine of attacking medicine.

In industrial applications, Yuanming powder can be used as a dry strength agent in cement and concrete to improve the initial compressive strength of concrete. The reasonable addition amount is 0.5%~1.5% to ensure the uniformity of concrete structure. In addition, Yuanming powder is chemically soluble in water, and its solution is usually neutral, soluble in glycerol but insoluble in ethanol, with certain chemical stability.

Requirements for exporting talcum powder and metamorphic powder by sea usually include the following aspects:

1. Product quality and safety: Talcum powder products need to meet the quality and safety standards of the destination country and region.

2. Compliance: Talcum powder should ensure compliance with all relevant international regulations and standards before export, including but not limited to the International Maritime Dangerous Goods Code (IMDG Code) and so on.

3. Packaging Requirements: Talcum powder exported by sea needs to be properly packaged to prevent damage or leakage during transportation.

4. Export Documents: Exporters need to prepare complete export documents, including commercial invoice, packing list, export license and so on.

5. Customs declaration: Exporters should declare the exported goods to customs and provide necessary documents and information for smooth customs clearance.

6. Dangerous goods identification: If talcum powder is classified as dangerous goods, it is necessary to identify the use of dangerous goods packaging before export and obtain the corresponding identification results.

7. Environmental requirements: exporters need to ensure that the export of talc meets the environmental requirements to avoid pollution of the environment.