Indian Tea Sourcing & Grading Knowledge Base
Navigating the Indian commercial tea market requires a solid understanding of agricultural flushes, mechanical grading classifications, electronic auction catalogues, and international shipping protocols. Operating from our Siliguri sourcing hub at the gateway to Assam, Darjeeling, and Dooars, Byahut Tea Company provides this technical knowledge library to help commercial buyers, blenders, and importers evaluate specifications and make informed procurement decisions.
Knowledge Library Architecture
- • Tea Types & Grading: CTC Grades, Assam Grades, and CTC vs Orthodox.
- • Terroir & Seasonality: Darjeeling Seasonal Flushes.
- • Auction Procurement: Indian Tea Auction Buying.
- • Food Safety & Testing: Pesticide Residue & MRL Standards.
- • Trade Shipping & Logistics: FOB vs CIF Commercial Terms.
Essential Sourcing & Technical Guides
Explore our technical guides organized by commercial discipline to support your blend development, procurement strategy, and compliance management.
CTC Tea Grades Guide →
Detailed breakdown of granular cut sizes (BP, BOP, PF, OF, Dust), infusion rates, liquor density, and commercial blending applications across everyday tea products.
Read CTC Grades Guide →Assam Tea Grades Guide →
Understanding how Assam’s Brahmaputra terroir influences both CTC and Orthodox leaf classifications, from bold breakfast cuts to tippy whole-leaf lots.
Read Assam Grades Guide →Darjeeling Seasonal Flushes Guide →
Comparative analysis of First Flush spring teas, Second Flush muscatel harvests, and Autumnal lots, explaining climatic drivers and Geographical Indication rules.
Read Darjeeling Guide →CTC vs Orthodox Comparison →
A technical comparison of cell maceration versus traditional rolling, detailing differences in cup strength, liquor clarity, extraction kinetics, and commercial use.
Read Comparison Guide →Indian Tea Auction Buying Guide →
How the Indian electronic auction system operates across STAC (Siliguri) and GTAC (Guwahati), covering catalogue publishing, pre-auction cupping, bidding, and prompt settlement.
Read Auction Guide →Pesticide MRL Standards Guide →
An objective explanation of Maximum Residue Limits, regulatory differences across key markets (EU, UK, US, Japan), and pre-shipment laboratory screening protocols.
Read MRL Standards Guide →FOB vs CIF Shipping Terms →
A practical guide to international Incoterms in bulk tea export, detailing division of freight risk, marine insurance coverage, and port handover responsibilities.
Read Incoterms Guide →White Tea Educational Guide →
Botanical plucking standards, minimal withering chemistry, Silver Needle and White Peony grading classifications, and delicate amino-acid-rich flavor profiles.
Read White Tea Guide →Oolong Tea Educational Guide →
The science of semi-oxidation, leaf perimeter bruising (yao qing), roasting parameters, and the sensory continuum from green floral to dark mineral oolongs.
Read Oolong Guide →Export Documentation Authority Guides
Authoritative legal and trade references explaining company-level statutory licensing versus per-consignment export documentation in Indian bulk tea commerce.
Tea Export License India →
Statutory framework under the Tea Act 1953, Tea Board of India licensing requirements, and overseas buyer verification protocols.
Read License Guide →Tea Export RCMC Guide →
Registration-cum-Membership Certificate mandate, DGFT integration, customs EDI validation, and export trade privileges.
Read RCMC Guide →DGFT Importer-Exporter Code (IEC) →
Primary 10-digit entity identifier, ICEGATE customs linkage, Authorized Dealer (AD) Code registration, and annual validation.
Read IEC Guide →Certificate of Origin (COO) →
Non-preferential vs preferential trade agreements (CEPA, AIFTA, SAFTA), issuing agencies, and customs tariff benefits.
Read COO Guide →Phytosanitary Certificate →
Plant Quarantine inspection, botanical sampling, freedom from quarantine pests, and pre-departure issuance timelines.
Read Phyto Guide →Tea Fumigation Certificate →
Phosphine vs Methyl Bromide, ISPM-15 heat-treated pallets, taint prevention protocols, and destination quarantine rules.
Read Fumigation Guide →Tea Commercial Invoice →
Harmonized System sub-headings (0902.40), Incoterms 2020 valuation, currency settlement, and UCP 600 banking scrutiny.
Read Invoice Guide →Tea Export Packing List →
Granular weight calculations, sack stenciling, container stuffing tallies, and bulk density variations across grades.
Read Packing List Guide →Bill of Lading in Tea Export →
Negotiable B/L vs Sea Waybill / Telex Release, Clean on Board endorsements, and Kolkata / Haldia port operations.
Read Bill of Lading Guide →Certificate of Analysis (COA) →
Laboratory testing parameters, moisture limits, multi-residue pesticide screening, heavy metals, and food safety compliance.
Read COA Guide →Logistics & Commercial Shipping Decision Guides
Technical shipping references covering container optimization, port gateway infrastructure, maritime risk management, and transport economics in bulk Indian tea export.
FOB vs CFR vs CIF Tea Shipping →
Comprehensive commercial decision guide comparing maritime delivery terms, freight booking economics, and port risk transfer.
Read Incoterms Guide →FCL vs LCL Tea Shipping →
Full container economics vs consolidation perils, co-loading odor taint hazards, and minimum volume viability thresholds.
Read FCL vs LCL Guide →Tea Container Loading Guide →
Loose floor loading vs palletized stowage trade-offs, volume payload loss, and certified SOLAS weighbridge compliance.
Read Loading Guide →Tea Container Stuffing →
Empty container pre-inspection, food-grade kraft paper dressing, desiccant poles, and container sweat prevention.
Read Stuffing Guide →Kolkata Port Tea Shipping →
Historic port infrastructure (INCCU1), riverine Hooghly draft dynamics, dock CFS, and regional feeder sailing loops.
Read Kolkata Port Guide →Haldia Port Tea Shipping →
Deep-water riverine berths (INHAL1), draft advantages over Kolkata, lock gates, and heavy containerized routing.
Read Haldia Port Guide →Tea Cargo Insurance Guide →
Institute Cargo Clauses (Tea), ICC (A) All Risks coverage, freshwater and taint claims, and survey documentation.
Read Insurance Guide →Tea Shipping Weight & Volume →
CTC vs Orthodox bulk density differences, container cubic capacity, payload modeling, and density formulas.
Read Weight & Volume Guide →Tea Export Transit Planning →
Farm-to-port milestone scheduling, Siliguri and Assam highway transit, port dwell times, and vessel cut-offs.
Read Transit Guide →Tea Sample Courier Protocol →
Pre-Shipment Sample (PSS) drawing, hermetic aluminum pouch packing, express air dispatch, and approval protocols.
Read Sample Protocol →Quality, Testing & Specification Knowledge Guides
Technical educational references covering physical evaluation standards, analytical laboratory testing protocols, sensory cupping disciplines, and specification benchmarks.
Tea Moisture Testing Guide →
Loss on Drying (LOD) oven protocols, digital halogen analyzers, water activity (aw), and microbial stability.
Read Moisture Guide →Tea Sensory Evaluation Guide →
Four-stage professional cupping: dry leaf, infused out-turn, liquor appearance, and palate aspiration.
Read Sensory Guide →Tea Cupping Terms Glossary →
Commercial tasting vocabulary: briskness, body, astringency, coppery out-turn, creaming down, and defect descriptors.
Read Cupping Glossary →How to Read a Tea COA →
Interpreting analytical laboratory test reports: units of measure (ppm/ppb), Limits of Quantification, and report validity.
Read COA Guide →Tea Pesticide Testing Guide →
Dual-platform chromatography, Plant Protection Code (PPC), EU default limits (0.01 mg/kg), and multi-residue screening.
Read Pesticide Guide →Tea Heavy Metals Testing →
Toxic trace metal screening: Lead (Pb), Cadmium (Cd), Arsenic (As), Mercury (Hg), and magnetic iron separation.
Read Heavy Metals Guide →Tea Microbiology Testing Guide →
Biological pathogen criteria: Total Plate Count, Salmonella freedom, E. coli, yeasts & molds, and cold-brew food safety.
Read Microbiology Guide →Export Residue Testing Protocols →
Pre-export testing workflows, accredited lab turnaround times, composite sampling, and container stuffing clearance.
Read Export Protocol →Sample vs. Production Lot Guide →
Managing natural agricultural variations, composite mechanical blending, Sale by Sample law, and commercial tolerances.
Read Lot Consistency Guide →Tea Quality Specification Sheet Guide →
Structuring Technical Data Sheets (TDS): physical parameters, ISO 3720 chemical limits, sensory criteria, and packaging standards.
Read TDS Guide →Tea Grading & Processing Knowledge Guides
Technical reference guides explaining mechanical sorting principles, physical leaf hierarchies, manufacturing science, and commercial quality dynamics in Indian tea.
Orthodox Tea Grades Guide →
Four-tier orthodox spectrum: FTGFOP, TGFOP, FBOP, and BOPF sorting architecture, particle dimensions, and extraction kinetics.
Read Orthodox Grades Guide →Orthodox Tea Grading Terms →
Deciphering historical trade acronyms: Orange Pekoe, Flowery, Golden, Tippy, and dispelling commercial retail misconceptions.
Read Grading Terms Guide →CTC Tea Processing Science →
Four-stage CTC manufacture: withering troughs, cylindrical grooved roller maceration, continuous fermentation, and fluid-bed drying.
Read CTC Processing Guide →Orthodox Tea Processing Science →
Classical artisanal manufacture: hard withering, eccentric circular table rolling, gentle floor oxidation, and aroma preservation.
Read Orthodox Processing Guide →Tea Leaf Grading & Sieve Sizing →
Wire mesh screen calibration, particle size distribution, preventing blend stratification, and electrostatic fiber separation.
Read Leaf Grading Guide →Tea Grade vs. Quality Demystified →
Why physical leaf size does not equal cup excellence: plucking standards, seasonal flushes, elevation, and fit-for-purpose sourcing.
Read Grade vs Quality Guide →Tea Liquor Character Analysis →
Theaflavins (TFs) and Thearubigins (TRs) balance, liquor brightness, optical depth, and natural creaming down precipitates.
Read Liquor Character Guide →Briskness, Body & Aroma Guide →
Decoding the sensory triad: theaflavin astringency, thearubigin viscosity, volatile terpene chemistry, and retro-nasal olfaction.
Read Sensory Triad Guide →Indian Tea Seasonality Calendar →
First Flush, Second Flush, Monsoon volume, Autumnal flushes, winter dormancy, and annual procurement timing windows.
Read Seasonality Calendar →Commercial Tea Lot Evaluation →
Pre-purchase auction due diligence, catalogue verification, garden invoice checks, inward counter-cupping, and risk protocols.
Read Lot Evaluation Guide →Sourcing, Auction & Procurement Knowledge Guides
Authoritative guides explaining Indian tea auction architecture, trading ecosystems, catalogue deconstruction, warehouse sampling protocols, and strategic seasonal buying.
Guwahati Tea Auction Centre (GTAC) Guide →
Institutional history, electronic bidding systems, broker roles, catalogue structures, and commercial access through authorized buying channels.
Read GTAC Guide →Siliguri Tea Trade Ecosystem Guide →
North Bengal commercial nerve center: STAC auction mechanics, Sevoke Road warehousing, blending facilities, and Kolkata port transit.
Read Siliguri Trade Guide →How to Read a Tea Auction Catalogue →
Deconstructing Indian e-auction catalogues: garden marks, invoice chronologies, package types, weights, GP notations, and broker valuations.
Read Catalogue Guide →Commercial Tea Lot Sampling Protocol →
Warehouse sampling spears, statistical package frequency, composite sample homogenization, counter-samples, and barrier packaging.
Read Lot Sampling Guide →The Commercial Tea Procurement Cycle →
End-to-end 45-day commercial workflow: garden manufacture, cataloguing, pre-bid cupping, prompt payment, DO issuance, and export dispatch.
Read Procurement Cycle →Tea Auction Price Discovery Guide →
Supply-demand elasticity, seasonal flush curves, domestic vs export purchasing power, reserve prices, out-lots, and blender hedging.
Read Price Discovery Guide →Seasonal Tea Procurement Strategy →
Managing annual procurement across harvest flushes, navigating the 90-day winter shutdown, forward contracts, and multi-flush recipe stabilization.
Read Seasonal Strategy Guide →Buyer Guides, Pricing & Commercial Decision Resources
High-value commercial decision resources for international buyers: procurement channels, supply chain architecture, importer customs preparation, due diligence checklists, master grade matrices, and origin buying guides.
How to Buy Indian Tea Guide →
Comparing auction bidding, direct estate contracts, and merchant sourcing; spot purchases vs. forward contracts and volume planning.
Read How to Buy Guide →How to Source Tea from India →
Aligning origin terroirs (Assam, Dooars, Terai, Darjeeling) with target product applications, blend recipes, and partner audits.
Read Sourcing Architecture →How to Import Tea from India →
The overseas buyer's guide: destination licenses (FDA/EORI), HS code 0902 tariffs, MRL compliance, port handling, and devanning.
Read Importer Guide →The Indian Tea Buyer Checklist →
Actionable 5-stage verification roadmap: supplier vetting, sample cupping, chemical MRL screening, contracts, and delivery checks.
Open Buyer Checklist →Indian Tea Grade Reference Matrix →
Comprehensive technical comparison of all CTC (BOP, BP, PF, Dust) and Orthodox (FTGFOP, FBOP) grades, particle sizes, and packaging roles.
View Grade Matrix →Assam CTC Buying Decision Guide →
Commercial buyer guide: evaluating Upper Assam riverine terroirs, thearubigin depth, Second Flush peaks, and packet vs. tea bag cuts.
Read Assam Buying Guide →Darjeeling Tea Buying Decision Guide →
Geographical Indication authentication, 87 defined gardens, seasonal flush trade-offs (1st vs 2nd vs Autumnal), and specialty packaging.
Read Darjeeling Guide →Indian Tea Sourcing Guide for International Buyers →
Macro strategy for corporate importers: cross-border MRL frameworks, currency hedging, winter shutdown continuity, and ocean freight corridors.
Read International Buyer Guide →Frequently Asked Questions: Tea Knowledge Base
What technical topics are covered in the Byahut Tea Knowledge Base?
Our knowledge library provides objective reference guides covering commercial CTC sieve grading (BP, PF, Dust), Orthodox leaf hierarchies (FTGFOP, BOP), Darjeeling seasonal flushes, Indian electronic auction procurement mechanics (STAC and GTAC corridors), global Maximum Residue Limit (MRL) testing frameworks, and international export Incoterms (FOB vs CIF).
Who are these technical tea guides designed for?
These guides are designed for commercial tea buyers, blenders, private label brand developers, and import managers who require practical, industry-standard clarity on Indian tea classifications, quality variables, and trade mechanics.
How is the technical information in these guides validated?
Information is compiled from standard Indian tea trade conventions, statutory Tea Board of India grading nomenclature, internationally recognized sensory cupping protocols (ISO 3103), and commercial procurement realities across North Bengal and Assam.
Applying Tea Knowledge to Commercial Sourcing
Submit your target liquor profile, particle cut, or blend objective to receive aligned lot recommendations and courier counter-samples.