II. Material Structure Selection: Reverse Engineering from Tea Categories
Different types of tea have significantly varying requirements for preservation, resulting in completely different packaging material structures.
2.1 Green Tea, Yellow Tea (Unfermented Tea) — Highest Preservation Requirements
Green tea is unfermented, preserving the highest levels of tea polyphenols and vitamin C. However, it is also the most prone to oxidation, leading to discoloration and flavor changes. Premium green teas such as West Lake Longjing, Biluochun, and Xinyang Maojian prioritize freshness preservation as the primary concern in packaging.
- Recommended structure: PET/AL/PE or PET/VMPET/PE
- Barrier requirements: Must include an AL (aluminum foil) layer, WVTR ≤ 0.1, OTR ≤ 0.1
- Additional Measures: Nitrogen flushing packaging, residual oxygen content ≤1%
- Avoid pitfalls: The barrier property of metallized film (VMPET) is one order of magnitude worse than that of aluminum foil; high-grade green tea is not recommended to be packaged in metallized film.
2.2 Oolong Tea, Black Tea (semi-fermented/fully fermented) — high preservation requirements
Products such as Tieguanyin, Da Hong Pao, and Zhengshan Xiao Zhong have a higher degree of fermentation and are slightly less sensitive to oxidation compared to green tea, but still require good barrier properties.
- Recommended structure: PET/VMPET/PE or PET/AL/PE
- Barrier requirements: WVTR≤0.5，OTR≤0.5
- Additional Measures: Nitrogen flushing or vacuum packaging available
- Note: Strong-flavor Oolong tea is more sensitive to odors, it is recommended to use AL aluminum foil structure
2.3 White Tea, Black Tea (Post-fermented Tea) — Special Storage Requirements
White tea and Pu’er tea have the characteristic of becoming more fragrant with age. The packaging needs to find a balance between moderate breathability and moisture-proofing and odor resistance.
- Recommended structure: PET/PE (Moderate Breathability) or Specialty Paper/AL/PE (Mid-Term Storage)
- Note: Fully sealed aluminum foil bags are not suitable for long-term storage of white tea and pu-erh tea as they hinder the post-fermentation process.
- Solution: Wrap with breathable cotton paper first, then place in an aluminum foil bag to balance post-fermentation and moisture protection
2.4 Bagged Tea – Small Packaging, Big Consideration
The inner bag material of tea bags comes into direct contact with boiling water, requiring the highest safety standards.
- Recommended Materials: Food-grade nylon mesh fabric, PLA biodegradable material, cotton paper
- Outer Bag Structure: Paper/AL/PE or Paper/PE (moisture-proof outer bag)
- Note: The inner bag material must comply with the GB 4806.7 food contact standard and be heat-resistant (≥95°C)
For compliance requirements regarding food-grade packaging materials, refer to the Food-Grade Sputter Film Supplier Selection Guide to understand specific requirements for material certification, migration testing, and compliance documentation.
III. Bag Type Selection: Matching Brand Positioning and Sales Channels
3.1 Stand-up pouch (Doypack) —— E-commerce mainstream choice
- Suitable Products: 50g–500g tea leaves
- Advantages: Excellent 3D display effect, strong presence on shelves, with a zipper for repeated sealing
- Design Highlights: The stability of the stand-up bag after the gusset is unfolded directly affects the consumer experience; it is recommended to perform a drop test.
- Huashu Packaging Solution: HASUPACK offers various customized stand-up pouch options, including zipper-equipped, transparent window-equipped, and irregularly shaped stand-up pouches.
3.2 Eight-Side Sealed Bag (Flat Bottom Pouch) — Preferred Choice for Premium Brands
- Suitable Products: 100g-1kg premium tea leaves
- Advantages: Flat base for stable standing, printable on all five sides, offering the largest brand display area
- Cost: About 25%–35% higher than self-standing bags, but with stronger brand premium capability
- Case Study: Premium White Tea, Aged Pu’er, Gift Tea – Multi-Use Octagonal Bag
3.3 Three-Side Sealed Flat Bag — Economical / Small Packaging Option
- Suitable Products: 5g–50g small packaging, sample tasting packaging, outer bag for tea bags
- Advantages: Low cost, suitable for multi-flavor combo packaging
- Note: The sealing strength of the three-side sealed bag is crucial; it is recommended that the heat-sealing width be ≥8mm.
3.4 Canister Alternative: Stand-Up Zip Bag
An increasing number of tea brands are replacing traditional iron cans with stand-up zipper bags, simply because soft packaging has 60%–70% lower transportation costs than iron cans and is less prone to deformation during transit.
- Structural Recommendations: PET/AL/PE Stand-up Bag with High-Quality Zip Closure
- Added Value: QR codes can be printed on the bag body, linking to brand stories or brewing instructions, enhancing consumer engagement.
Four. Preservation Technology: Value-Added Solutions Beyond Material Itself
Choosing the right material structure is just the first step in tea preservation. True preservation experts will also focus on packaging techniques.
4.1 Nitrogen Packaging Technology
Nitrogen flushing involves removing air from the bag and replacing it with food-grade nitrogen to reduce residual oxygen content to below 1%, significantly slowing down tea oxidation.
Key Parameters:
- Residual oxygen content: ≤1% (for premium green tea, ≤0.5%)
- Nitrogen purity: ≥99.9%
- Testing Method: Random sampling using a headspace gas analyzer
Cost Increase: Nitrogen packaging increases the cost by approximately 0.05–0.15 yuan per bag compared to regular packaging, but enhances preservation effectiveness by 3–5 times, making it highly cost-effective for premium tea.
4.2 Use of Oxygen Absorbers
For small packaged tea products that are inconvenient to be filled with nitrogen, such as 5g sample packs, placing a small oxygen absorber inside the bag is the most cost-effective preservation solution.
- Selection Recommendations: 20–50cc oxygen absorber is suitable for 50g tea packaging, 100cc is suitable for 100g–250g packaging.
- Note: The outer bag of the oxygen absorber must be intact and undamaged, and must bear the markings “0 Not edible 1”.
- Innovative Solutions: Combining oxygen absorbers with aroma retention technology, some premium brands are already using this approach.
4.3 Single Serve Trend
A clear trend in tea consumption is miniaturization and refinement. Single-serving packages ranging from 5g to 8g ensure freshness with each brewing session while lowering the barrier for consumers to try new products.
- Packaging Form: Three-sided sealed pouch, three-dimensional triangular package, cotton paper package
- Brand Opportunities: Print different text on small packaging (e.g., 0 Morning Tea, 1, 2 Afternoon Tea, 3, 4 Evening Tea, 5) to enhance consumer interaction and social sharing.
Five. Printing and Design: Making Tea Packaging Talk
Tea is a product highly dependent on visual appeal and cultural storytelling, and packaging design directly influences consumer purchasing decisions.
5.1 Color and Cultural Symbols
- Green Tea: Green, Cyan, White convey freshness, naturalness, and spring
- Black Tea: Red, gold, and dark brown convey warmth, richness, and classic elegance.
- Pu’er Tea: Brown, dark green, and antique bronze convey the sense of time, accumulation, and collection.
- White Tea: Off-white, light gray, and pale gold convey simplicity, purity, and healthiness.
5.2 Information Hierarchy Design
The information on tea packaging should be arranged according to the consumer decision-making logic:
1. Brand Name + Tea Product Name(Maximum Font Size)
2. Origin + YearCore Trust Elements (e.g., 2026 Early Spring West Lake Longjing)
3. Net Content + Brewing Recommendation(Practical Information)
4. Shelf Life + Storage Conditions(Regulatory Required)
5. Trace Code / Anti-counterfeit CodeBuilding Trust, Especially for High-End Tea
5.3 Trade-offs in Transparent Window Design
The transparent window allows consumers to see the tea, enhancing trust, but also introduces light, accelerating tea oxidation.
Win-win solution:
- Partial transparent window (exposing only part of the tea leaves)
- The transparent window area is controlled to be between 15% and 25% of the bag body area.
- Use composite films with good light-blocking properties to compensate for light influence.
Six. Tea Packaging Customization Practical Checklist
Checklist for Implementation:
1. Confirm all product specifications and numbers are accurate.
2. Ensure the translation is natural, fluent, and professional.
3. Maintain consistency in terminology and style.
4. Verify that no original text, notes, or explanations are included.
5. Output only the translated content without any additional information.
Materials and Structure
- Select barrier level based on tea category (use AL aluminum foil for green tea, breathable structure for pu’er tea)
- Confirm WVTR and OTR specifications (premium tea WVTR ≤ 0.5, OTR ≤ 0.5)
- Inner PE layer meets GB 4806.7 food contact standard, request test report
- Thickness ≥ 90μm (recommended ≥ 110μm for large sizes)
Bag Type and Function
- E-commerce sales should prioritize stand-up pouches or eight-sided sealed bags.
- [ ] High-quality zippers are selected, requiring ≥20 open-close test cycles
- Small packaging (≤50g) is more cost-effective with three-sided flat bags
- Consider nitrogen flushing packaging with residual oxygen ≤1%
Printing and Design
- Color scheme matches tea categories and cultural positioning
- [ ] Information Hierarchy: Brand Name → Origin Year → Specifications → Brewing Recommendations → Traceability Code
- The transparent window area is controlled between 15% and 25% to balance display and freshness preservation.
- Offset printing process ensures that the ink does not come into direct contact with the tea leaves.
Quality Verification
- Request WVTR/OTR test report
- Request heat seal strength test report (≥30N/15mm)
- Conduct accelerated stability testing (40°C/75% RH, to validate shelf life)
- Nitrogen flushing package sampling residual oxygen content test
Seven. Environmental Trends: Sustainable Upgrades for Tea Packaging
The environmental awareness of tea consumers is rapidly increasing, especially among the younger generation of tea drinkers. A 2026 survey shows that over 55% of tea buyers prefer more eco-friendly packaging.
Eco-friendly Upgrade Path for Tea Packaging:
- Biodegradable cotton paper + outer bag: Inner packaging uses biodegradable cotton paper, and outer packaging uses a single-material PE bag, combining traditional aesthetics with recyclability.
- Single Material Structure: All-PE structure stand-up bag, with slightly lower oxygen barrier than aluminum foil composite film, but recyclable, suitable for mid-range tea
- Reduced Material Design: Remove unnecessary outer packaging (such as color boxes around iron cans) and use soft packaging as the direct sales packaging.
For a systematic comparison of eco-friendly packaging materials, read “How to Choose Plastic Packaging Products?” to understand the three main technical routes—biodegradable, single-material, and PCR—and their application prospects in tea packaging.
Conclusion
Customizing tea packaging involves finding the optimal balance between preservation performance, brand presentation, cost, and environmental sustainability. For tea brands, packaging is not only a tool for protecting the tea but also a medium for conveying the story of the origin, craftsmanship, and brand value.
Whether you are a tea brand owner looking to upgrade your existing packaging or a tea e-commerce business aiming to optimize product presentation, you can start by testing the concept with small batch samples. HASUPACK offers a complete line of customized tea packaging bags, including stand-up bags, eight-side sealed bags, three-side sealed bags, and additional value-added services such as nitrogen filling and oxygen absorber configuration. Welcome to visit our website.Tea Packaging Product ClassificationContact the Huashu Packaging team directly for customized tea packaging solutions.