Corn Silk for Herbal Tea & Infusion Manufacturers

Why Corn Silk Grade Selection Defines Your Infusion Quality

For herbal tea and infusion producers, the physical form of Corn Silk is not a secondary specification — it determines brew colour, flavour consistency, fill weight accuracy, and whether the material runs cleanly through automated tea-bagging lines. TANDOR supplies Corn Silk specifically prepared for these requirements, with multi-origin sourcing and documented traceability from farm to EU warehouse.

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Forms & Physical Specifications for Tea Applications

Cut-and-Sifted (C/S) is the standard tea-grade form. Dried stigmas are cut and passed through defined sieve sizes, typically retaining material between 1.0 mm and 3.15 mm screens, to produce a uniform, flowable fraction that doses accurately on volumetric or weight-based filling machines. This is the preferred form for pyramid bags, flat teabags, and loose-leaf blends.

Whole dried stigmas are available for manufacturers who perform in-house milling, cut-grading, or who blend into visually marketed loose-leaf products where intact, silky strands are a selling point. Whole material requires careful moisture control (target ≤ 10 % on delivery, per good herbal practice aligned with GACP guidelines) to prevent clumping and mould development during storage.

Sieve Grade Options

• C/S fine (1.0–2.0 mm dominant fraction): Suited to flat teabags with tighter mesh; minimises dust pass-through.
• C/S standard (1.5–3.15 mm dominant fraction): The most common tea-bag and pyramid-bag grade; good surface area for extraction without fine particle migration.
• Milled / powder (< 500 µm): Available for encapsulation or functional beverage applications; less common in infusion use due to turbidity in cup.

Specify your required sieve fractions and maximum dust/fines percentage when requesting a sample — TANDOR provides screen analysis data on each batch Certificate of Analysis.

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Flavour, Colour, and Extraction Characteristics

Corn Silk imparts a mild, subtly sweet, slightly grassy flavour profile that blends compatibly with diuretic-themed formulations alongside nettle, dandelion, or horsetail. Colour in infusion ranges from pale gold to light amber, depending on drying temperature and post-harvest oxidation. Low-temperature drying (below 40 °C) is specified for colour-sensitive applications — high-temperature processing darkens the stigmas and shifts cup colour toward brown, which can be a formulation defect in visually premium products.

Request organoleptic reference standards and colour photos alongside physical samples so your QC team can set incoming acceptance criteria.

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Microbiological Standards for Tea-Grade Material

Tea-grade Corn Silk must meet microbiological limits appropriate for products consumed as a hot infusion. The European Pharmacopoeia (Ph. Eur.) general chapter 5.1.8 *Microbiological Quality of Herbal Medicinal Products for Oral Use* provides the most widely referenced framework. For infusions prepared from non-sterile herbal material, typical acceptance criteria include:

• Total Aerobic Microbial Count (TAMC): ≤ 10⁷ CFU/g (Ph. Eur. 5.1.8, category 4B — material for hot-water extraction)
• Total Yeast and Mould Count (TYMC): ≤ 10⁵ CFU/g
• Absence of *Escherichia coli* per 1 g
• Absence of *Salmonella* spp. per 25 g

Many food-grade buyers and private-label retailers apply tighter house limits. TANDOR batch CoAs report actual counts rather than simply pass/fail, allowing your QA team to trend supplier performance across batches.

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Decontamination: Steam Sterilisation vs. Irradiation

Steam sterilisation (autoclaving or continuous steam treatment) is the EU default for organic-certified herbal material. It preserves organic status under Regulation (EC) 2018/848 without introducing ionising radiation. The trade-off is potential minor colour shift and flavour attenuation at aggressive parameters — short-cycle, low-temperature steam (e.g., saturated steam at 100–105 °C) is preferable for Corn Silk intended for premium infusions.

Irradiation is legally permitted in the EU for dried herbs under Directive 1999/2/EC, but irradiated material must be labelled accordingly and cannot carry EU-Organic certification. Most herbal tea brand owners and private-label retailers currently avoid irradiated material due to retailer exclusion policies and consumer perception. Confirm your decontamination requirement at the enquiry stage — TANDOR sources from facilities that can supply both treated and untreated lots with full processing documentation.

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Certifications Relevant to EU Herbal Tea Buyers

• EU-Organic (Regulation 2018/848): Available for Corn Silk from certified farms in Eastern Europe and the Balkans. Each lot is covered by a valid organic certificate from an accredited control body (e.g., LACON, Ecocert, CCPB). TANDOR coordinates certificate chain-of-custody to your facility.
• EU Novel Food status: Corn Silk (Zea mays stigma) has documented history of use in the EU prior to May 1997 and is not classified as a novel food — no pre-market authorisation is required.
• Pesticide residues: Compliance with EU MRL Regulation (EC) 396/2005 is confirmed by multi-residue pesticide screening on each batch, reported on the CoA.
• Heavy metals: Batch testing against EU food safety benchmarks (Regulation (EC) 1881/2006 and its amendments) for lead, cadmium, arsenic, and mercury.
• GACP alignment: Preferred suppliers operate under WHO Good Agricultural and Collection Practices, documented in supplier audit files held by TANDOR.

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Origin, MOQ, and Sourcing Realities

Corn Silk is harvested as a by-product of sweet corn or grain maize processing, which means supply volumes are seasonal and origin-dependent. Primary origins available through TANDOR include Romania, Bulgaria, Ukraine (pre-border processed and EU-imported), and China (for conventional grade with full EU import documentation). Organic-certified lots are more constrained in volume — early-season pre-booking is advisable.

Minimum order quantities for tea-grade C/S material typically start at 25 kg per lot for sample/development orders, with commercial quantities from 100–500 kg. Bulk pallet quantities are available subject to seasonal availability. TANDOR consolidates multi-origin sourcing so buyers are not single-source dependent.

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How TANDOR Supports EU Herbal Tea Manufacturers

As a Romania-based EU sourcing intermediary, TANDOR operates within the EU regulatory and customs framework from day one — no third-country import complexity for material already cleared into the EU. Every shipment is accompanied by a batch-specific Certificate of Analysis, organic certificates where applicable, and phytosanitary or health certificates as required by destination country. Multi-origin access means supply continuity when a single harvest underperforms. Samples are dispatched for QC evaluation before any commercial commitment is required.