Iranco Magazine Team
Technical specs, weight grading, QC laboratory tests, export packaging requirements and industrial supply strategy
Export guide · White eggs · Industrial procurement
White Shell Eggs: Sizing and Purchasing Guide for Food Manufacturers
Technical specs, weight grading, QC laboratory tests, export packaging requirements and industrial supply strategy
This practical guide helps food-plant procurement managers and international traders align commercial orders with weight tolerances, laboratory tests and cold-chain standards so processing cost stays optimised.
White shell eggs are a core functional ingredient in emulsions, sponge structure, heat-set gels and binding. Iran produces over 1.33 million tonnes annually with a structural surplus of 100–135 thousand tonnes. Treating eggs as undifferentiated bulk at plant scale is a strategic error: a few grams’ deviation in average weight shifts albumen dry matter, yolk viscosity and final product texture.
1. Commercial position and geography of white egg production in Iran
Modern layer farms across central, northern and western Iran balance domestic supply and export surplus. Annual output exceeds 1.3 million tonnes, mostly white Leghorn strains. Qom, Tehran, Alborz, Qazvin, Isfahan, East Azerbaijan and Razavi Khorasan are industrial hubs.
Per-capita use is about 14.5 kg/year; domestic offtake near 1.18 million tonnes still leaves 130–160 thousand tonnes for export. Automated collection and veterinary oversight are structural advantages.
2. Weight grading, standard sizing and physical attributes
Industrial buyers need uniform weight classes because automatic breaking lines reject mixed lots. The table summarises Small through Jumbo grades and typical processing uses.
| Weight grade | Single egg (g) | 180-count net (kg) | Gross with trays (kg) | Optimal processing use |
|---|---|---|---|---|
| Small | < 53 | < 9.54 | 10.30–10.50 | liquid/powder |
| Medium | 53–62.9 | 9.54–11.32 | 10.60–12.10 | mayo/meat |
| Large | 63–68 | 11.34–12.24 | 12.30–13.10 | bakery export |
| Extra Large | 68.1–73 | 12.25–13.14 | 13.20–14.00 | frozen dough/HoReCa |
| Jumbo | > 73 | > 13.14 | > 14.00 | yolk separation |
3. Technical specifications expected in food processing
Purchase documents must state chemical and functional parameters matched to each processing line.
| Parameter | Expected range | Buyer / QC importance |
|---|---|---|
| Albumen % | 56–60% | foam & sponge |
| Yolk % | 28–32% | emulsion |
| Shell % | 9–11% | transit strength |
| Albumen Brix | 11.5–12.5% | powder yield |
| Yolk Brix | 48–52% | mayo body |
| Albumen pH | 7.6–9.2 | freshness |
| Yolk pH | 6.0–6.6 | vitelline membrane |
Bakery, biscuit and sponge lines
Albumen proteins stabilise foam; stale whites collapse baked volume.
Mayonnaise and sauce plants
Yolk lecithin builds oil-in-water emulsion; vitelline membrane must stay intact.
Cooked meat and sausage
Heat-set egg protein binds fat and moisture; controlled micro load limits spoilage.
Liquid and powder plants
Medium and small grades; albumen and yolk Brix drive dryer energy and powder yield.
4. Quality grading, shell structure and defects
Premium eggs show clean intact shells without faecal smears or external blood. Cuticle integrity is the first microbiological barrier.
- Hairline cracks: visible under candling; bacterial ingress path.
- Blood and meat spots: follicle rupture; hurt appearance of liquid egg.
- Air cell height: under 4 mm when fresh; over 8 mm indicates age.
- Chalaza and yolk displacement: weakened protein anchors let yolk float.
Professional contracts cap breakage and cracks at cold-store unload around 2–3%.
5. Laboratory tests and QC indices
Physicochemical and microbiological release tests prevent incompatible lots entering continuous production.
| Test | Method / equipment | Grade A | Industrial B | Importance |
|---|---|---|---|---|
| Haugh Unit | Tripod micrometer | ≥ 72 | 60–71 | albumen freshness |
| Yolk Index | Height / diameter | 0.38–0.44 | 0.30–0.37 | breaking line |
| Shell thickness | Edge micrometer | 0.35–0.42 mm | 0.30–0.34 mm | crack resistance |
| Salmonella | 25 g enrichment | Negative | Negative | food safety |
| TVC | Plate count (CFU/g) | < 5×104 | < 105 | spoilage risk |
| Antibiotic MRL | ELISA / rapid | Below official MRL | Below official MRL | fermentation safety |
با افزایش دما، واحد هاو کاهش و زرده پهن میشود؛ پایش روزانه وضعیت نگهداری قبلی را آشکار میسازد.
6. Quarantine rules, standards and customs clearance
White egg exports face strict avian quarantine to block highly pathogenic influenza and other poultry diseases.
- Farm registration in the national sanitary traceability system and valid sanitary code.
- Periodic negative AI and Newcastle monitoring certificates.
- No surface faecal contamination; compliance with national standard 219.
- Gregorian lay and expiry jet-print with food-grade ink.
- Commercial undertaking to clear customs before shelf expiry.
Fresh unfertilised table eggs clear under 0407.21.10 (distinct from hatching eggs 0407.11).
7. Industrial and export packaging engineering
Weak board or damp pulp trays raise breakage on lower pallet tiers. The export default is a 180-egg master carton with six 30-egg pulp trays.
| Component | Technical spec | Functional role |
|---|---|---|
| Master carton | 34.5 × 31.7 × 31.7 cm | pallet fit |
| Board | 5-ply B/C flute | BCT / side crush |
| BCT | ≥ 450–500 kgf | 5–6 tier stack |
| Pulp tray | Moulded fibre | vibration cushion |
| Pallet | 100 × 120 cm | stretch & corner boards |
Pulp trays must be new, dry and odour-free; perforated shrink wrap limits condensation in hot destinations.
8. Cold chain, logistics and transit risks
Eggs remain metabolically active; cold-chain breaks quickly erode Haugh units and protein functionality.
| Logistics variable | Short haul (<72h) | International reefer | Non-compliance impact |
|---|---|---|---|
| Transit temperature | 10–15 °C | 2–4 °C | HU loss / micro growth |
| RH | 70–75% | 75–80% | dry-out or mould |
| Temperature swing | ≤ 2 °C | ≤ 1 °C | shell sweating |
| Farm to border | ≤ 3 days | ≤ 5 days | retail shelf life |
Shell sweating after cold cargo meets humid air is the main risk; trucks need air suspension and temperature loggers.
9. Regional target markets and competitive position
Water-stressed neighbours rely on imports; Iran supplies via fast land bridges and Gulf ports.
| Destination | Share of demand | Grade & pack | Clearance requirements |
|---|---|---|---|
| Iraq | 40–50% | 180-ct, 11.5–12.5 kg | Mehran/Chazabeh borders |
| Afghanistan | 20–25% | 180-ct, 10.5–11.5 kg | Dogharoon/Milk |
| UAE | 10–15% | 5-ply, 60–65 g | GSO, Gregorian print |
| Qatar / Bahrain | 5–8% | Humidity-tight pack | Strict MRL checks |
| Russia | Emerging | Euro pallet, cold-stable | EAEU vet protocol |
10. Regional competitor comparison
Iran competes with Turkey, India and Ukraine in regional white-egg trade.
| Country | Strength | Structural limit | Price position |
|---|---|---|---|
| Iran | Fast land 3–5 days | Export levy swings | Competitive |
| Turkey | Sorting & branding | Feed & energy cost | Mid-high |
| India | Huge volume | Long sea transit | Low floor |
| Ukraine | Liquid/powder share | Black Sea logistics | Mid |
Three- to five-day land transit lets Iranian loads arrive with firm albumen and high freshness.
11. Pricing structure, contracts and industrial cost
Bulk contracts price per kilogram of carton net weight; industrial cost models focus on dry matter minus shell and board.
12. Ten-point importer checklist before firm order
Procurement managers should verify the following before signing a firm contract:
13. Official request-for-quote (RFQ) guide
Vague RFQs such as “one container of eggs” prevent like-for-like bids. A standard RFQ includes:
- Season and weather: spring and summer favour bulk buys for processors; autumn and winter lift retail-driven base prices.
- Weight grade: cartons under 10.5 kg net tend to price lower per kg; export premium lots above 65 g per egg command a premium.
- Feed inputs: maize, soya and premixes account for more than 70% of farm cost and move quotes with FX.
- Incoterms: EXW at farm cold store versus FCA/CPT at border or FOB Gulf ports changes the price stack.
- Weight grade and tolerance: single-egg band (e.g. 60–63 g) and 180-count carton mean (e.g. 11.5 kg ± 200 g).
- Breakage and hairline cap: typically max 2–2.5% at buyer cold-store unload with a clear debit formula.
- Minimum Haugh unit: written commitment to HU > 70 on arrival at plant.
- Microbiology: Salmonella negative in 25 g and TVC below national critical limits.
- Shell cleanliness: no faecal soiling, blood spots or soft shells.
- Board spec: new five-ply carton, adequate BCT, no off-odour recycled board.
- Jet print: Gregorian lay and expiry plus farm sanitary code on shell.
- Loading inspection: random sampling, weighbridge and temperature at origin.
- Farm sanitary code: veterinary registry and disease-free zone certificate.
- Fleet: refrigerated container 2–4 °C with data logger.
- Product: fresh white table eggs, unfertilised, mechanically graded.
- Weight grade: per-egg range and 180-count carton average.
- Volume: cartons or total tonnage (e.g. 1250–1400 cartons per container).
- Packaging: five-ply export carton, standard pallet, new pulp trays.
- Shell marking: Gregorian dates and farm code.
- Delivery point: border gate, port or buyer cold store.
- Certificate of analysis: Salmonella, Haugh unit, TVC, antibiotic MRL panel.
On Iranco you can submit a purchase request with product, pack and destination details so matching suppliers are reviewed.
Export white egg supply through Iranco
Iranco lets bulk buyers register supply requests against clear technical criteria—weight grade, carton type, shell print and tonnage. Register your specification and volume on Iranco to review aligned sourcing options.
Contact IrancoFAQ
Why do food plants often prefer white over brown shell eggs?
Nutrient value is equivalent, but white layers convert feed more efficiently and candling shows defects more clearly on white shells.
What does the Haugh unit measure?
A logarithmic index linking thick albumen height to egg weight; above 72 is excellent, below 60 is export-reject territory.
How much weight loss is normal in transit?
Typically 0.5–1.5% net weight over a 3–5 day refrigerated move, usually written into bulk weighbridge clauses.
What weakens yolk membrane in sauce lines?
Age, warm storage and water migration into the yolk; rough roads accelerate vitelline rupture.
What basics are needed for an export quote from Iran?
Tonnage, 180-count carton weight band, five-ply board, Gregorian shell print and Incoterms—Iranco reviews bids on that basis.
Minimum shell thickness for containerised moves?
Target 0.35–0.40 mm; under 0.30 mm fails stacked pallet loads.
How does direct farm supply work?
Veterinary-coded farms, negative AI tests, new export cartons and reefer transit; submit specs via Iranco.
Should eggs be washed before export?
No—non-industrial washing strips cuticle and opens pores to Salmonella ingress; regional export rules require clean unwashed eggs under cold chain.
Analytical summary
White eggs in food manufacturing are functional raw material; bulk success depends on weight grading, Haugh units, microbiological control, cold chain and five-ply cartons.
Iran’s 1.33 million tonne capacity supports regional supply; precise technical contracts minimise border holds and stabilise plant cost.
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