7542

7542 is not a tea variety and not a single mountain, but a 唛号 mài hào recipe of sheng pu-erh from 勐海茶厂 (Menghai Factory, brand 大益 dà yì), which the market has adopted as a reference point: it serves to calibrate the taste, price, and maturity of nearly all other 青饼.

1. Classification and Origin:

• Type: sheng pu-erh (raw, not post-fermented), 青饼 qīng bǐng — “green” cake.
• Category: factory recipe-唛号 mài hào (factory article number), not a variety and not single-origin material.
• Origin: 勐海茶厂 (Menghai Factory, brand 大益 dà yì), 勐海 Měnghǎi County, Xishuangbanna.
• What the four digits encode: the 唛号 mài hào system — of factory article numbers — has been in effect since 1976 and is read according to strict logic. Four digits indicate pressed tea (five indicate loose tea), and each position carries meaning:
  • [1–2] — the year the recipe was approved;
  • [3] — the grade (tenderness) of the primary material: the smaller the digit, the more tender the leaf;
  • [4] — the manufacturing factory: 1 — 昆明 Kūnmíng / 中茶, 2 — 勐海 Měnghǎi / 大益, 3 — 下关 Xiàguān, 4 — 普洱 Pǔ’ěr.
• Decoding 7-5-4-2: recipe from 1975, primary material of 4th grade, factory No. 2 — Menghai. It is important to understand that the digit does not denote “all material of a single grade”, but the supporting, dominant grade in the blend: 7542 is conceived as a balanced blend, where the 4th-grade leaf forms the backbone, while more tender and coarser fractions contribute aroma and structure.
• Neighbouring article numbers from the same factory: 7572 is the benchmark 熟饼 (same 1975 year, but 7th-grade material and post-fermentation), while 8582 is a 1985 sheng based on coarser 8th-grade leaf. Against this background, 7542 occupies the “golden mean” — hence its reputation as a benchmark.

2. History and Cultural Significance:

• Recipe date: 1975. 7542 became one of the flagship products of 勐海茶厂 during the era of planned tea production, when 唛号-numbering (from 1976 onwards) replaced anonymous batches. Over the decades, 7542 turned into the country’s most replicated and recognizable 青饼.
• «88青饼» bā bā qīng bǐng: a separate chapter of its legend — this is the name given to batches of 7542 from approximately 1988–1991 that settled and aged in Hong Kong. It was precisely these cakes, matured in the humid Hong Kong climate, that shaped the collector community’s notion of what a well-aged factory sheng should become, and secured 7542’s status as a market benchmark.

3. Botanical Description and Material:

• Variety/Cultivar: large-leaf material of the Yunnan type — the very 大叶种 dà yè zhǒng from which pu-erh is fundamentally made.
• Maocha: the leaf is picked, withered, enzyme-fixed in a wok (杀青 shā qīng), rolled, and sun-dried, yielding maocha — 晒青毛茶 shài qīng máo chá. It is specifically the sun-drying, as opposed to machine-drying, that preserves the fermentative potential which allows sheng to “live on” and transform over the years.
• Blending by grades: for 7542, this maocha undergoes sorting by grades and is then assembled into a blend according to the recipe logic: a supporting 4th grade plus corrective fractions. Such an approach requires the master blender (拼配师 pīn pèi shī) not only to select the current harvest, but also to keep the “taste of 7542” consistent from batch to batch.

4. Terroir and Cultivation Features:

• Geographical link: the fourth digit “2” ties 7542 to 勐海 Měnghǎi — a county in Xishuangbanna, the historical centre of industrial pu-erh production.
• Blend, not single-origin: the key feature of the recipe is that it is a 配方 pèi fāng — a blend, not 纯料 chún liào (single-origin material from one village).
• Conceptual watershed: here lies the watershed of the entire world of sheng pu-erh. On one pole is 名寨纯料 míng zhài chún liào, the pure leaf of famous villages (老班章, 冰岛, 易武), where the uniqueness of a specific slope is prized. On the other pole are the large factories (大廠 dà chǎng), which build a recognizable, year-after-year reproducible profile through the blending of material from different territories and different grades. 7542 is precisely the flagship of the second approach: its strength lies not in the rarity of a single source, but in the stability and predictability of a recipe proven over decades.

5. Production Technology:

• Class: 7542 belongs to 青饼 qīng bǐng — “green”, i.e., raw (not post-fermented) cakes.
• Pressing: after the blend is composed, the tea is steamed, packed into a cloth bag, shaped, and pressed into a round cake, which is then slowly dried.
• 七子饼 qī zǐ bǐng: the finished cakes are traditionally assembled into a stack of seven, wrapped in a bamboo leaf wrapper.
• Without 渥堆: raw 青饼 is not subjected to “wet piling” (渥堆 wò duī), which produces 熟普; the entire transformation of 7542 is a slow, natural aging process, and it is for this that collectors buy it.

6. Organoleptic Characteristics:

• Young 7542: the classic “textbook” sheng profile — pronounced bitterness (苦 kǔ) and astringent astringency (涩 sè), followed by a rapid sweet aftertaste 回甘 huí gān and salivation 生津 shēng jīn. The aroma of a fresh cake is herbaceous-floral, with a light woody-tobacco base from the blend.
• With years of proper storage: bitterness and harshness recede, notes of dried fruits, honey, and aged wood appear, the infusion darkens and thickens. It is for this predictable and “reference” aging trajectory that 7542 is valued as a benchmark: tasters often compare an unfamiliar 青饼 “by 7542”.

9. Brewing:

• It is most appropriately brewed using the gongfu method in a gaiwan or Yixing teapot: dense leaf loading, full-boiling water, short infusions with gradual lengthening.
• Young material requires special attention to temperature and time — otherwise the bitterness will come to the fore; aged batches are more forgiving and sustain many infusions.

11. Price and Counterfeits:

• Documentability: since 7542 is a factory product, its authenticity is primarily discerned by the brand 大益 / 勐海茶厂, by the article number-唛号 itself, and by the batch code (批次 pī cì), which indicates the year and sequential number of the release. This makes 7542 one of the most “documentable” teas on the market: specific batches from different years possess their own reputation, price, and aging curve.
• Systemic trap: the same article number is issued year after year, therefore “7542” without specifying the year and batch is merely a recipe, not a specific tea. A young cake from the current year and an aged batch from twenty years ago carry the same number, yet they are entirely different beverages.
• How to tell apart and avoid confusion:
  • 7542 vs. 7572. Both are 1975 recipes from the Menghai Factory, but 7542 is a raw 青饼 (sheng), while 7572 is a post-fermented 熟饼 (shu). The third digit (4 vs. 7) indicates a different grade of material.
  • 7542 vs. 8582. Both are sheng from 大益, but 8582 (1985 recipe) is built on coarser 8th-grade leaf; the profile is denser and simpler, without the “middle-ground” balance of 7542.
  • Recipe vs. single-origin material. If you are faced with 老班章 or 冰岛 — this is 纯料 from a specific village, whose value lies in uniqueness; 7542, conversely, is valued for the opposite — the stability of the blend.
  • Year and batch are decisive. Genuine 7542 is identified by the brand 大益 / 勐海茶厂, the article number, and the batch code; without specifying the year, “7542” remains the name of a recipe, not a characteristic of a specific cake.

12. Interesting Facts:

• It is precisely this combination — a clear recipe, a legible article number, and decades of reproducibility — that makes 7542 the coordinate system against which it is convenient to describe the entire rest of the sheng pu-erh world.