20+ critical packaging terms
defined by physical test standards.
| Engineering Term | Quantitative Definition & Physical Mechanism | Vella Governance Standard |
|---|---|---|
| Brimful vs. Nominal Capacity | Nominal capacity is the marketing label volume (e.g., 50 ml); brimful capacity is the actual water overflow volume to the rim. Heavy-wall glass jars often hold 10–15% less than nominal if inner cup tolerances are not checked. | Mandatory water-weight overflow verification before order sign-off (>=+10% headspace allowance for sealing disc). |
| Neck Finish Code (18/410, 20/410, 24/410) | GPI/SPI thread standard: first number is outer thread diameter in mm (18, 20, 24, 28 mm); second number is thread style/skirt height (400 = shallow 1-turn, 410 = medium 1.5-turn, 415 = tall high-profile). | Cross-factory thread gauge & dip-tube length calibration (±0.2 mm) across bottle and pump plants. |
| FEA 15 Crimp vs. Screw Neck | European Federation of Aerosol standard for fragrance flacons (15 mm neck). Crimp requires a collet crimping machine after filling; crimp-less/screw FEA 15 allows hand or semi-auto assembly for small runs. | Matched flacon + FEA 15 pump + step-less anodized collar + Zamac/magnetic cap tested as a 5-piece unit. |
| Delta E (ΔE ≤ 1.5) Colour Matching | CIE Lab numerical distance between master Pantone standard and production part under D65 daylight. ΔE > 2.0 is visibly mismatched to the naked eye on a retail shelf. | X-Rite spectrophotometer verification across glass spray, PP injection, tube printing, and carton ink. |
| Moulded-in vs. Sprayed White | Moulded-in colour mixes masterbatch pigment into molten resin (translucent depth); sprayed colour applies surface coating (opaque uniform finish). They never match each other visually even under the same Pantone code. | Upfront route alignment so multi-SKU collections share consistent surface optical physics. |
| -0.08 MPa Vacuum Leak Test | Filled container placed in vacuum chamber at -0.08 MPa (-80 kPa) for 15 minutes to simulate high-altitude air freight and thermal expansion. | Zero visible seepage; weight loss <= 0.5% across 50-unit OQC sample lot. |
| 48°C / 30-Day Compatibility Test | Accelerated aging protocol (roughly equivalent to 12–18 months ambient shelf life) testing filled formula inside final packaging for stress cracking, bulb swelling, pH shift, or pump spring corrosion. | Written 30-day compatibility report issued during Module 3 (Sample) before bulk run. |
| 5-Layer EVOH vs. ABL / PBL Tube | EVOH co-extruded plastic tubes achieve oxygen transmission rates (OTR) < 1.5 cc/m²/day without metal foil; ABL uses an aluminium barrier layer for aggressive actives/SPF; PBL is all-plastic laminated for recyclability. | Barrier layer matched to formula volatility (Retinol, Vitamin C, chemical SPF, essential oils). |
| 30/40/30 Private Mould Ownership | Tooling milestone structure: 30% deposit to cut steel, 40% upon T1 sample approval, 30% upon final T2 golden sample sign-off, with written bilingual title deed vesting 100% mould ownership in the brand. | Standard Module 4 contract clause; brand may transfer or recall its mould at any time without penalty. |
| AQL ISO 2859-1 (4-Gate QC) | Statistical acceptance sampling across IQC (incoming resin/glass), IPQC (in-line decoration), FQC (assembly), and OQC (pre-shipment): Critical = 0, Major = 1.0–1.5, Minor = 2.5–4.0. | Photographed OQC report delivered before balance wire transfer. |
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We'll map the right factory route.
Tell us what you are packaging, target capacity, decoration idea, and approximate run quantity. Alex Gao and our packaging engineering desk reply within 24 hours with honest route options (Stock vs. Decorated Stock vs. Private Mould) and reference MOQ tiers.