Glass; drawn glass and blown glass, in sheets, whether or not having an absorbent, reflecting or non-reflecting layer, but not otherwise worked

HS code 7004 is a 4-digit heading in the Harmonized System that covers: Glass; drawn glass and blown glass, in sheets, whether or not having an absorbent, reflecting or non-reflecting layer, but not otherwise worked. Heading 7004 covers drawn glass and blown glass, presented in sheets, which may or may not have an absorbent, reflecting, or non-reflecting layer, but crucially, is "not otherwise worked." This classification specifically addresses flat glass produced by drawing (pulling molten glass vertically) or blowing (inflating a glass cylinder that is then cut and flattened). These methods typically yield glass with slight optical distortions or surface imperfections compared to modern float glass. Historically, drawn and blown glass were the primary methods for producing window panes and other flat glass applications before the advent of the float process. While less common for large-scale architectural projects today, it still holds significance for specific applications where its characteristics are suitable or desired, such as picture framing, greenhouses, or restoration projects. The "not otherwise worked" condition is paramount for trade compliance; any processing beyond basic cutting to shape (e.g., bending, drilling, or extensive edge working) would move the product out of 7004 and into headings like 7006. Understanding the manufacturing method is key to accurate classification, distinguishing it from cast/rolled glass (7003) and float glass (7005). This heading reflects an important stage in the evolution of glass manufacturing within Chapter 70, which comprehensively covers glass and glassware.

Unworked drawn sheet glass, basic window glass, greenhouse glass panes, horticultural sheet glass, picture frame glass, photographic plate glass (unworked), thin blown glass sheets, unworked sheet glass for mirrors, standard clear drawn glass, tinted drawn glass (unworked), heat-absorbing drawn glass, non-reflecting drawn glass, unworked blown glass for restoration, low-cost sheet glass, rough drawn glass for partitions, single-strength drawn glass, double-strength drawn glass, unworked drawn glass for solar collectors, general-purpose flat glass (drawn), unworked sheet glass for display cases, drawn glass for small appliances, unworked blown glass for scientific apparatus, drawn glass for cold frames, unworked drawn glass for cabinet doors, basic drawn glass for craft projects.

Traders often misclassify drawn or blown glass (7004) by confusing it with cast/rolled glass (7003) or, more commonly, with float glass (7005), which is now the predominant method for flat glass production. The distinction lies entirely in the manufacturing process. Another frequent error is classifying glass under 7004 when it has undergone further processing beyond simple rectangular or square cutting, such as bending, drilling, or extensive edge work, which would correctly place it in heading 7006. If the glass has been toughened (tempered) or laminated for safety purposes, it must be classified under 7007, irrespective of its initial manufacturing method.

While float glass dominates, countries with established traditional glass industries or those seeking cost-effective alternatives for less demanding applications continue to produce and trade drawn and blown glass. Major players include China, India, and various countries in Southeast Asia and Eastern Europe. Importing regions often include those with significant agricultural sectors (for greenhouses) or markets for basic construction and framing materials. Tariff rates are generally influenced by thickness and surface treatments, with potential for preferential treatment under bilateral or regional trade agreements. Anti-dumping duties are less common for these types compared to float glass but can occur.

HS code 7004 is a 4-digit heading under Chapter 70 of the Harmonized System. The first 2 digits (70) identify the chapter, and digits 3-4 (04) specify the heading. This code contains multiple 6-digit subheadings for precise product classification.