Tea Bags — History and Technology

The tea bag was not invented. It was noticed. When American tea merchant Thomas Sullivan sent tea samples to customers in small silk pouches in 1908, intending the recipients to remove the tea and brew it loose, they instead dunked the pouches directly in hot water and found the result convenient. Sullivan’s customers had invented the tea bag for him. He was smart enough to recognize the opportunity and begin producing bags in purpose-made gauze mesh. The accident unlocked the largest format shift in tea history, eventually moving the majority of global tea consumption from loose leaf to bagged — changing not only how tea was prepared but what was inside it, what it cost, and who drank it.

In-Depth Explanation

History of the Tea Bag

Precursors (pre-1900):

Several 19th-century inventions prefigured the tea bag concept — perforated metal infuser balls, small cloth pouches, and similar devices for containing loose tea while brewing were patented in various forms. None achieved commercial significance.

Thomas Sullivan (1908):

New York tea merchant Thomas Sullivan began sending tea samples to potential customers in small hand-sewn silk organza bags — intended as elegant, reusable sample packaging. Customers, unfamiliar with the intent, dunked the bags directly in hot water. The convenience was immediately apparent to both customers and Sullivan, who began producing gauze mesh bags specifically for this brewing method within months.

Early commercial development (1910s–1930s:

Several manufacturers developed competing bag formats:

• Gauze mesh (Sullivan’s original approach) → eventually replaced by paper
• All-Season Tea (Dexter Specialty Papers, 1930s): development of heat-sealable paper for machine production of tea bags
• Machine sealing → mass production → dramatic cost reduction

Tetley and Brooke Bond (UK, 1950s):

American-style tea bags arrived in Britain commercially in the late 1950s–early 1960s. Tetley introduced round bags in 1953; Brooke Bond (PG Tips) followed. Despite initial consumer resistance (“not proper tea”), the convenience advantage drove rapid adoption. By the 1980s, tea bags accounted for the majority of British tea sales; by 2000, over 95% of British tea sold was in bags.

Pyramid bag (Tetley, PG Tips, 2000s):

The pyramid bag — a tetrahedral form with more interior volume than a flat bag — allowed larger, whole-leaf or larger CTC pieces to infuse more freely. Marketed as superior to flat bags for higher-grade teas. The material shifted from paper to heat-sealed nylon or PLA (polylactic acid plant-based alternative) mesh.

The Technology — Bag Materials

Different tea bag materials create different consumer and environmental profiles:

The microplastic problem:

A 2019 study (McGill University) found that a single plastic-mesh pyramid tea bag at 95°C released approximately 11.6 billion microplastic particles per bag into the infusion. While the health consequences of ingested microplastics remain under study, this finding has accelerated brand transitions away from nylon and polypropylene-sealed bags toward paper and PLA alternatives.

What’s Inside — CTC and the Tea Bag Grade System

The tea bag transformation did not only change the packaging — it changed what was inside. The adoption of CTC (Cut, Tear, Curl) processing was commercially co-dependent with tea bag adoption:

Why CTC suits bags:

• Fast extraction: CTC’s small, uniform particles (with high surface area per gram) extract completely in 2–4 minutes — the consumer’s expected steep time
• Consistent color: CTC produces very consistent dark amber color per gram; no variation from bag to bag that consumers might misinterpret as quality variation
• Cost: CTC processes large volumes of coarser, lower-grade leaf efficiently; the broken small pieces would not be attractive loose-leaf product

Tea bag grade designations:

Commercial tea intended for bags is sold in specific CTC grades:

• Dust (D): Very fine; maximum extraction speed; most tea bags use dust or fannings
• Fannings (F): Slightly larger than dust; still fast extraction; standard for competent everyday bags
• Broken Orange Pekoe Fannings (BOPF): Better-grade CTC; slightly more aromatic than pure dust; used in “premium” mainstream bags
• Broken Orange Pekoe (BOP): Small broken orthodox leaf; sometimes used in premium bag tiers

Loose-leaf in bags:

Some specialty-tier tea bags deliberately use larger leaf material in pyramid bags:

• Whole-leaf or large-broken orthodox in a pyramid bag provides better flavor potential than CTC dust
• Still lacks the full infusion space of a traditional teapot/gaiwan preparation
• Represents a middle position: convenience + somewhat higher quality than standard CTC bags

Global Scale of Tea Bag Industry

The scale of tea bag production is staggering:

• Approximately 500–600 billion tea bags produced annually worldwide
• Equivalent to roughly 65–75 bags per year for every person on Earth
• UK market alone: approximately 60+ billion tea bags annually
• The US, Germany, Russia, Pakistan, and Turkey are major tea bag markets

This production volume drives the economics of CTC: the global CTC industry exists primarily to fill tea bags. The vast majority of tea produced — and therefore the majority of farm income from tea — flows through the bag-production supply chain.

Tea Bags vs. Loose Leaf — The Quality Argument

The standard specialty tea community position:

Loose-leaf whole-leaf or large-broken orthodox tea provides:

• Larger intact leaf → more aromatic compound preservation
• Room to unfurl and infuse fully → more complex extraction
• Typically higher-quality leaf material (producers sell best grades loose; bag grades from lower quality)
• Multiple infusions possible with most loose-leaf teas

The counterpoint:

• Some high-quality loose-leaf teas are available in bags (pyramid format with quality leaf)
• The “convenience gap” between bags and loose leaf is real; for daily office/commuter consumption, the quality loss may be acceptable trade-off
• The lowest-quality loose-leaf teas available commercially are not significantly better than the best bag teas; quality ranking is not simply “loose = better”

The realistic synthesis:

The tea bag format enables global scale consumption at accessible price points. Without bags, global tea consumption would be a fraction of current volumes. Within the bag format, quality varies enormously; the worst bags (heavily stale dust in polypropylene-sealed bags) are genuinely inferior to good loose leaf; the best pyramid bags with quality leaf approach acceptable everyday quality. The choice is fundamentally about priorities: convenience, cost, environmental impact, or flavor performance.

Common Misconceptions

“Tea bags always contain tea dust and sweepings.” This was historically accurate as a generalization of mass-market bags, and remains largely true for the cheapest supermarket options. However, specialty pyramid bags may contain whole-leaf or large orthodox tea. The bag format does not exclusively specify the grade inside.

“The tea bag was invented in England.” The tea bag was invented and first commercially developed in the United States (Sullivan, 1908; early machine production in American factories). Britain adopted it commercially in the 1950s, and Britain is where it achieved its deepest cultural integration — but the invention is American.

“Removing the bag after 2–3 minutes prevents bitterness.” This advice is partly correct for over-extraction scenarios with standard CTC bags. With quality loose leaf or whole-leaf pyramid bags, longer steep times may be perfectly appropriate. The 2–3 minute guidance was developed for CTC dust in standard flat bags and should not be universally applied.

Related Terms

• CTC Processing
• Loose Leaf Tea
• Western Brewing
• British Tea Culture
• Blending
• English Breakfast Tea

See Also

• CTC Processing — the manufacturing process specifically co-developed with (and economically dependent on) tea bag production; understanding CTC explains the flavor profile of standard bag tea
• English Breakfast Tea — the blend style most associated with tea bag production; the blend formulas designed to work in bags (Assam CTC + Ceylon CTC + Kenyan CTC) are the dominant content of the world’s tea bags

Research

• Hernandez, L.M., et al. (2019). “Plastic teabags release billions of microparticles and nanoparticles into tea.” Environmental Science and Technology, 53(21), 12300–12310. McGill University study; steeped commercial plastic-mesh tea bags at typical brewing temperatures; found approximately 11.6 billion microplastic particles and 3.1 billion nanoplastic particles per bag released into infusion; particle types confirmed as nylon and polyethylene terephthalate matching the bag materials; findings prompted industry accelerated transition toward paper and PLA alternatives and regulatory attention to plastic bag materials in food contact applications.
• Macfarlane, A., & Macfarlane, I. (2003). The Empire of Tea: The Remarkable History of the Plant That Took Over the World. Overlook Press, New York. Broad historical treatment of tea’s global development; includes detailed account of the tea bag’s invention and commercial development; contextualizes the bag’s emergence within the broader 20th-century industrialization of food production and the democratization of affordable everyday beverages — useful for understanding the bag not as a degradation of tea culture but as the mechanism that enabled mass global tea consumption.