Chapter 68 covers articles of stone, plaster, cement, asbestos, mica and similar materials, mainly including shaped articles of mineral materials such as plates, sheets, bricks, tiles, etc. These articles are usually processed by agglomeration, molding or pressing, but are not more specifically named in other chapters. The scope of the chapter ranges from simple building stone articles to complex insulating materials, friction materials, etc., and is an important classification chapter for deeply processed mineral material products. Heading 6814 specifically covers mica articles, including mica plates, sheets, strips, rolls, etc., whether or not mounted on a support. Mica is a natural mineral with excellent insulation, heat resistance and chemical stability, so its articles are mostly used in electrical insulation, high-temperature heat insulation and other fields. This heading includes agglomerated mica, reconstituted mica and plates and sheets made from mica powder, but excludes raw mica or mica sheets merely cut (classified in Chapter 25). HS code 681410 is a six-digit subheading. The first 2 digits '68' represent Chapter 68, i.e., articles of stone, plaster, cement, asbestos, mica and similar materials. Digits 3-4 '14' represent heading 6814, specifically mica articles, including mica plates, sheets, strips, etc. Digits 5-6 '10' represent subheading 681410, further limited to 'plates and sheets of mica', i.e., agglomerated or reconstituted mica plates and sheets, usually rectangular or in specific shapes, used for electrical insulation or industrial purposes. This subheading does not include mica paper or mica tape (which may be classified under other subheadings of 6814), nor raw mica. This product is plates and sheets of mica, belonging to agglomerated mica products, with the physical form of plates and sheets, and conforms to the description of heading 6814. It differs from raw mica or simply cut mica sheets of Chapter 25 because it has undergone agglomeration, pressing and other processing; it also differs from insulating parts of Chapter 85 because it is not combined with electrical components and is only in material form. Therefore, classification under 681410 is the most accurate.

Product name: The standard name of the declared commodity, which should describe the material and form in detail, such as 'mica plate' or 'mica sheet' Material: Explain the type of mica, such as natural mica, synthetic mica, reconstituted mica, and the type of binder Specifications and dimensions: Declare the thickness, width, length and other dimensions of the plate or sheet, as well as the shape (rectangular, circular, etc.) Use: Explain the main use, such as electrical insulation, high-temperature heat insulation, substrate for electronic components, etc. Processing method: Describe the processing technique, such as agglomeration, pressing, cutting, etc., and whether it is mounted on a support Brand or model: If there is a brand or model, it must be declared in order to identify the specific product Appearance: Describe appearance characteristics such as color, transparency, surface treatment, etc. Product name: mica plate; Material: agglomerated natural mica, containing silicone binder; Specifications and dimensions: thickness 0.5 mm, width 1000 mm, length 2000 mm, rectangular; Use: used for electrical insulation of motors; Processing method: agglomerated and pressed, not mounted on a support; Brand: ABC; Model: M-100; Appearance: golden yellow, translucent, smooth surface. Mica plates are mistakenly declared as mica paper, resulting in an incorrect subheading; mica paper is usually classified under other subheadings of 6814. Failure to state whether a support is attached; if attached to a metal foil or other support, classification may be affected. Incomplete declaration of specifications and dimensions, especially thickness, may raise suspicion of other mica articles.

The core criteria for classification are: 1. whether the product is a mica article; 2. whether it has undergone processing such as agglomeration or pressing rather than simple cutting; 3. whether its physical form is a plate or sheet; 4. whether it is used for industrial purposes such as electrical insulation. According to the Import and Export Tariff, plates and sheets of mica specifically refer to plates and sheets made of agglomerated mica or reconstituted mica, usually with regular shapes, used for insulation, heat insulation, etc. If mica sheets are only simply cut and not agglomerated, they are classified in Chapter 25. If combined with electrical components, they may be classified in Chapter 85. 252510 Raw mica and simply cut mica sheets: 252510 is unprocessed mica or mica sheets only simply cut, while 681410 is agglomerated or reconstituted mica plates and sheets, with a different degree of processing. 681490 Other mica articles: 681490 covers mica tape, mica paper, mica rolls and other mica articles not elsewhere specified, while 681410 specifically refers to plates and sheets. 854790 Electrical insulating parts: 854790 is mica articles already made into electrical insulating parts, such as insulators, bushings, etc., while 681410 is only plates and sheets in material form. 681599 Other stone articles: 681599 covers articles of other mineral materials and does not include mica. If mica plates are mistakenly classified here, the material is incorrect. Has it been confirmed that the product is made of mica? Has it undergone agglomeration or pressing processing? Is it in the form of a plate or sheet? Is it not combined with other electrical components? Has it not been classified in Chapter 25 or Chapter 85?

What is the difference between a mica plate and a mica sheet? Are the HS codes the same? Mica plates and mica sheets both belong to 681410 in the HS code, but plates usually refer to thicker, more rigid articles, while sheets refer to thinner, more flexible articles. Both must meet the requirements of agglomeration processing and plate or sheet form. When declaring, thickness and dimensions must be accurately described so that customs can confirm. How can it be determined whether a mica article is classified under 681410 or 681490? 681410 specifically refers to plates and sheets of mica, i.e., plates and sheets with a regular flat shape; 681490 is other mica articles, such as mica tape, mica paper, mica rolls, mica tubes, etc. If the product is in roll or strip form, it should be classified under 681490; if it is in flat sheet form, it should be classified under 681410. If a mica plate is used for electrical insulation, should it be classified in Chapter 85? Not necessarily. If the mica plate is only in material form and has not been made into a shape specially designed for electrical parts or assembled with other electrical components, it is still classified under 681410. Only when it has been made into special parts such as insulators or bushings is it classified in Chapter 85. How precise do the specifications and dimensions need to be when declaring? It is recommended to declare thickness, width and length to the nearest millimeter. Thickness is key because it affects classification (for example, extremely thin products may be regarded as mica paper). At the same time, indicate the shape and tolerance range to avoid customs doubts. Are the HS codes for synthetic mica and natural mica the same? Yes. HS code 681410 does not distinguish between natural and synthetic mica; as long as it meets the definition of plates and sheets of mica, it is classified under this code. However, when declaring, the type of mica must be indicated for customs statistics and supervision. How should a mica plate reinforced with metal foil be classified? If the metal foil serves only as a reinforcing support and mica remains the essential character, it is usually still classified under 681410. However, if the metal foil forms a conductive layer, it may be regarded as an electrical part and classified in Chapter 85. It is recommended to provide a detailed structural description. How can the import tariff rate for 681410 be checked? Tariff rates vary by country, trade agreement, origin, etc. The latest rates can be checked through the official website of the customs administration, the trade promotion council or a professional customs broker. Be sure to use the correct HS code and confirm whether there is a preferential trade arrangement. If a mica plate is cut into a specific shape, does that affect classification? No, as long as it remains in plate or sheet form and is not assembled with other parts, it is still classified under 681410. However, if it is cut into the shape of a specific electrical part, it may be classified in Chapter 85. When declaring, the use and shape after cutting must be explained.