Chapter 32 covers tanning and dyeing extracts, tannins and their derivatives, dyes, pigments and other coloring matter, paints and varnishes, putty and similar adhesives, inks, etc. This chapter is a category of chemical products closely related to coloring, coating, and printing, involving a wide range of commodities from natural extracts to synthetic chemicals. Prepared driers, as auxiliary materials for paints and varnishes, are classified in this chapter because they can accelerate drying. Heading 3211 specifically covers prepared driers. Driers are substances that can accelerate the oxidative polymerization of drying oils (such as linseed oil and tung oil), usually made from metal soaps (such as naphthenates or octoates of cobalt, manganese, lead, zirconium, calcium) compounded with solvents, stabilizers, etc. This heading only includes prepared driers, i.e., products that have been compounded and can be used directly, and does not include individual metal soaps or uncompounded chemicals. The first 2 digits "32" represent Chapter 32, belonging to the category of "Tanning and dyeing extracts; tannins and their derivatives; dyes, pigments and other coloring matter; paints and varnishes; putty and similar adhesives; inks", covering chemical products related to coloring and coating. Digits 3-4 "11" represent the heading, indicating "prepared driers". There is no further subdivision under this heading, so digits 5-6 are "00", i.e., subheading 321100. The overall code 321100 represents prepared driers, which is the complete tariff number in the 6-digit HS code, used for international trade commodity classification and customs declaration. Prepared driers are classified under 321100 because they are auxiliary materials for paints and varnishes and have been prepared to have a specific drying function. They are different from individual metal soaps (classified under 2915 or 2916, etc. as organic chemicals), different from unprepared catalysts (such as initiators or catalysts classified under 3815), and different from finished paints (classified under 3208 or 3209). 321100 specifically targets prepared driers, emphasizing their compounded nature and direct usability.

Product Name: The standard name of the declared commodity should use "prepared driers" or a specific commodity name, such as "cobalt drier" or "composite drier". Composition and Content: List the main active ingredients (such as the type and content of metal soaps) and solvents, additives, etc., expressed as percentages. Metal Type and Content: Clearly specify the type of metal in the drier (such as cobalt, manganese, zirconium, calcium, etc.) and its percentage content in the finished product. Use: Explain what kind of paint, ink, or resin system the drier is used for, such as "used in alkyd paints to accelerate drying". Packaging Specifications: Indicate the packaging form (such as iron drums, plastic drums) and net weight, to facilitate customs inspection and statistics. Brand or Model: Fill in the commodity brand or manufacturer model, which helps identify the specific product. Appearance: Describe the physical state of the product, such as liquid, viscous liquid, paste, etc., as well as the color. Product Name: Prepared drier (cobalt drier); Composition and Content: Cobalt naphthenate 30%, solvent oil 65%, stabilizer 5%; Metal Type and Content: Cobalt 6%; Use: Used in alkyd resin paints to accelerate drying; Packaging Specifications: Iron drum, net weight 180 kg/drum; Brand: XX brand; Model: Co-12; Appearance: Dark blue viscous liquid. Mistakenly classifying prepared driers under 3815 (other catalysts), ignoring their specificity as paint auxiliary materials. When declaring ingredients, only writing "metal soap" without listing the specific metal and content, causing customs to question the classification. Ignoring the declaration of metal content, which is one of the key indicators for determining whether a product belongs to driers.

The core criterion for classification is whether the commodity has been prepared and whether it is specifically used as a drier. Prepared driers are usually made by compounding one or more metal soaps with solvents and additives, and can accelerate the oxidative polymerization of drying oils. If it is a single metal soap that has not been prepared, it may be classified under the organic chemicals chapter; if it is an unprepared catalyst, it is classified under 3815. In addition, it is necessary to confirm that its use is for paints, varnishes, etc., rather than other catalytic reactions. 3815 Other catalysts: 3815 covers unprepared catalysts, initiators, etc., while 321100 specifically refers to prepared driers used for paint drying. If the product is a general-purpose catalyst, it should be classified under 3815. 2915 Saturated acyclic monocarboxylic acids and their derivatives: 2915 includes individual metal soaps (such as cobalt naphthenate) that have not been prepared into driers. If the product is a pure metal soap, it should be classified under 2915 or the corresponding heading. 3208 Paints and varnishes based on synthetic polymers: 3208 is finished paint, while 321100 is an auxiliary material used for paint. If the product itself is paint, it is classified under 3208. 3209 Water-based paints and varnishes based on synthetic polymers: 3209 is water-based finished paint, which has a different function from driers. Driers are additives and do not form films on their own. 3824 Chemical products and preparations of the chemical or allied industries, not elsewhere specified or included: 3824 is a residual heading. If a drier does not meet the definition of 321100 (e.g., not prepared), it may be classified under 3824, but 321100 is usually given priority. Has the product been prepared and can it be used directly? Is it specifically used to accelerate the drying of paints and varnishes? Is the active ingredient a metal soap? Are the metal type and content clearly specified? Are finished paints and unprepared chemicals excluded?

What is the difference in HS codes between prepared driers and unprepared driers? Prepared driers are classified under 321100, referring to products that have been compounded and can be used directly. Unprepared driers, such as individual metal soaps, are usually classified under the organic chemicals chapter (such as 2915, 2916, etc.). The key difference is whether they have been prepared and have a drying function. How can one determine whether a drier is "prepared"? Prepared driers usually contain multiple ingredients, such as metal soaps, solvents, stabilizers, etc., and have undergone a mixing process. If the product is a single chemical component without added additives, it may not be considered prepared. Product instructions and ingredient lists can be referred to. Does the metal content in a drier affect classification? Metal content is an important indicator for judging the performance of a drier, but classification is mainly based on whether it is prepared and its use. However, when declaring, the metal type and content must be provided truthfully so that customs can confirm the classification. The level of content does not affect the applicability of 321100. Are both water-based driers and solvent-based driers classified under 321100? Yes, 321100 does not distinguish between solvent types. As long as the product is a prepared drier used to accelerate the drying of paints and varnishes, whether water-based or solvent-based, it is classified under 321100. How are driers and desiccants distinguished in HS codes? Desiccants usually refer to substances that absorb moisture, such as silica gel, classified under 3824, etc. Driers are additives that accelerate the drying of oil-based paints, classified under 321100. The two have different functions and different classifications. If a drier is used for ink, is it still classified under 321100? Driers under 321100 are mainly used for paints and varnishes. If used for ink, it is necessary to confirm whether it still belongs to driers. Usually, ink driers are also classified under 321100, but if it is an additive specifically for ink, it may be classified under 3215, etc. It is recommended to judge based on the specific use and composition. Is an MSDS required for customs declaration of driers? Yes, driers usually belong to chemical products, and an MSDS (Material Safety Data Sheet) is required for customs declaration so that customs can understand the composition, hazardous characteristics, etc. The MSDS helps with accurate declaration and rapid customs clearance. Are HS codes for driers consistent across countries? The first 6 digits of the HS code are unified internationally, and 321100 is consistent in most countries. However, countries may subdivide the last 4 digits, so the actual declaration must be based on the importing country's customs code. It is recommended to consult the local customs tariff.