每年2000公噸，過去的命運是堆肥
阿里山的烏龍茶，梨山的高冷茶，杉林溪的霧氣與海拔——台灣高山茶的故事人人會說。但製茶過程中那些被篩掉的茶渣與茶末，每年累積約2000公噸，過去的標準結局是：堆肥，或直接廢棄。沒有人覺得這有什麼問題，因為副產品的本質就是被邊緣化。
直到農業部與設計品牌的合作，把這2000公噸送進了材料實驗室。
茶多酚為什麼是設計原料，而不只是健康話題
茶渣之所以成為可用的設計材料，關鍵不是「台灣茶很有名」這種文化修辭，而是具體的材料物性。茶末顆粒細緻度均勻，這在複合材料配比中是可重複的條件——顆粒不均的原料在壓製成型時容易出現結構弱點，茶末的細緻度省去了額外的研磨加工。更關鍵的是茶多酚，包含EGCG、EGC等化合物，具備抗氧化與天然抗菌特性，這使得茶渣複合材料在耐用性測試上有真實的物化優勢，而非只是「天然材料」的品牌說法。天然色素則賦予成品質感上的辨識度，那種帶著茶色系的沉靜，不是染料可以模擬的層次。
把這些特性送進複合材料測試，再進行生活用品產品線的開發，最終提交國際設計競賽——這條路徑不浪漫，但可重複。
iF與Red Dot同時拿到，設計圈為什麼在乎
iF Design Award創立於1954年的漢諾威，在設計業界的地位類似建築界的普立茲克——不是最難的技術競賽，而是最具公信力的市場認可指標。Red Dot Award同樣來自德國，評選標準側重產品的形態邏輯與使用者關係。這兩個獎項的評審文化略有差異：iF偏向整體創新概念，Red Dot更看重設計細節的完成度。同時拿下兩者，意味著這個茶渣材料計畫在概念層面和執行層面都通過了不同口味的歐洲設計評審，這在台灣設計史上屬於少見的雙金成就。
全球設計大獎的得主，通常是碳纖維複合材料、生物可降解聚合物、或精密製造的金屬結構件。農業副產品在這個圈子裡贏得評審，說明材料的稀缺性與在地不可複製性，已經成為國際設計語境中可計價的優勢。
手搖飲的10.75億杯，是一條廢棄物生產鏈
台灣茶渣的數量規模，不只來自高山茶的製茶工序。2024年台灣手搖飲料產業產值達1331億新台幣，全台超過16,000家門市，年消費量約10.75億杯——這個數字背後，是持續穩定的茶葉消耗，也是持續穩定的茶渣產出。供應鏈的穩定性是材料商業化最難解決的問題之一，而台灣的茶產業結構恰好提供了這個條件：原料充足、品質有標準、來源可追溯。
這讓我想起一個有趣的歷史切面：1934年台灣被排除在《國際茶葉限制協定》之外，其他產茶國被限制出口配額，台灣反而沒有束縛。1937年，台灣紅茶出口量達582萬公斤，佔當年總出口的52%。限制有時候製造機會，副產品有時候才是主角。這個產業的DNA裡，本來就有把邊角轉成爆品的記憶。
台灣還有哪些農業廢棄物在等待材料語言
台灣資源回收率超過60%，政府目標是在2030年實現2兆元的循環經濟產值。茶渣的設計轉化是一個工作樣本，但它不會是最後一個。稻稈已有製作板材的實驗案例；魚鱗的膠原蛋白成分在生醫材料領域有研究路徑；鳳梨釋迦在2021年失去主要外銷市場後，果渣與纖維的再利用討論也持續在農業改良場層面推進。這些副產品能不能像茶渣一樣，找到同時符合材料科學要求和設計語言的交叉點，還是未知數——但茶渣的雙金案例，至少證明了這條路的長度是可以丈量的。
2000公噸的茶渣，從堆肥變成iF與Red Dot的得主。下一個等待被丈量的副產品，可能正在某個農業改良場的角落堆著。
— 林知遠
延伸閱讀
Taiwan’s Tea Waste Just Won Two Design Golds Nobody Expected
Two Thousand Tonnes Nobody Wanted
Every year, the tea farms of Alishan, Lishan, and Shanlinxi produce a volume of tea dust and spent leaves that adds up to roughly 2,000 tonnes. For decades, the standard disposal route was composting — occasionally just landfill. No one questioned it. Byproducts get treated like byproducts.
Then Taiwan’s Council of Agriculture partnered with a design brand, sent that material to a lab, and the finished products walked away with both the iF Design Award and Red Dot Award. Simultaneously. The design industry calls that a double gold, and it rarely happens.
The Material Science First, Then the Story
The reason tea waste qualifies as a serious design material has nothing to do with cultural branding. Tea dust has unusually uniform particle size — a technical advantage in composite manufacturing, where inconsistent granules create structural weak points during compression. The polyphenol compounds in tea leaves, including EGCG and EGC, carry natural antioxidant and antibacterial properties that translate into measurable performance benefits in durability testing. The natural pigments produce a surface quality that synthetic dyes cannot replicate.
These are not metaphors. They are specifications. The design team ran material experiments, confirmed composite performance, developed a product line, and submitted to competition. A replicable process.
Why iF and Red Dot Are the Benchmarks That Matter
The iF Design Award, founded in Hannover in 1954, functions as the market credibility test for design concepts. Red Dot, also German, applies stricter scrutiny to execution quality and form logic. The two awards have different evaluation cultures — iF leans toward conceptual innovation, Red Dot toward completeness of design detail. Winning both means clearing two different juries with different aesthetic standards. For Taiwan’s design history, a simultaneous double gold is rare.
Standard double-gold winners in these competitions tend to be carbon fiber composites, biodegradable polymers, or precision-machined metal structures. Agricultural waste winning at this level signals that local irreproducibility has become a design asset with calculable market value.
The Bubble Tea Economy as a Byproduct Factory
Taiwan’s hand-shaken drink industry reached NT$133.1 billion in output value in 2024, with over 16,000 storefronts and roughly 1.075 billion cups consumed annually. Every cup represents consumed tea leaves, which means a steady, traceable supply of spent material. Stable raw material supply is one of the hardest problems in commercializing any new material. Taiwan’s tea industry structure solves it by default.
There is a useful historical parallel. In 1934, Taiwan was excluded from the International Tea Restriction Agreement that capped exports for other producing nations. By 1937, Taiwan’s black tea exports had reached 5.82 million kilograms, accounting for 52% of total exports that year. Constraints on competitors created an opening. The structural logic of turning a marginal position into an advantage runs deep in this industry’s history.
What the Next Byproduct Might Be
Taiwan’s resource recycling rate exceeds 60%, and the government has set a target of NT$2 trillion in circular economy output by 2030. Tea waste is one proof point, not the ceiling. Rice straw has experimental applications in structural board materials. Pineapple fiber and fish scale collagen both have documented research threads. The question is whether any of these can hit the same intersection — materials science viability plus an international design language — that the tea waste project found.
The double gold is a calibration point, not a formula. But it measures something useful: that 2,000 tonnes of material headed for a compost pile can clear the highest bar in international design evaluation. The next pile is probably already sitting somewhere in an agricultural testing station, waiting.
— 林知遠
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