A sprayed black jar is stock clear glass with an exterior coating: no tooling, a floor of 2,000–5,000 pieces per shape, about RMB 0.5–1.1 (≈USD 0.07–0.15) added per jar, and a 30–40 day sprayed run — the route for almost every indie skincare programme. Coloured glass is coloured in the melt: no coating to chip or lift, but the furnace must run your colour, so unless the tint is a stock one (amber, green, opal) it carries the made-to-order floor of 30,000–200,000 pieces and 30–60 days per run, and a matte surface still needs frosting or a coat on top. Choose sprayed for launch volumes and colour freedom; coloured glass for long-run programmes where an unbreakable colour and a mono-material jar matter more than minimums.
Two routes, one shelf
The glass industry is split between forming plants and decoration plants. A forming plant melts and presses the bare jar; a decoration plant sprays, frosts, prints and stamps it. A sprayed black jar uses the forming plant's stock clear glass and puts all the work — and all the set-up that is made for you alone — at the decorator. Coloured glass puts the work at the furnace: colourants go into the melt, the whole campaign runs that colour, and a furnace does not stop and restart for a small order.
The comparison
| Factor | Sprayed matte black on stock clear glass | Coloured glass (colour in the melt) |
|---|---|---|
| Where the colour is made | Decoration plant, after forming | Glassworks, in the furnace |
| Tooling | None — stock public mould | None if a stock shape exists in that colour; otherwise a mould at ≈RMB 4,000 (≈USD 555) per cavity |
| Indicative MOQ | 2,000–5,000 per jar shape via partner factories already tooled for small runs; undecorated stock from ~500 | Stock tints (amber, green, opal) at stock-glass floors; any other colour is made-to-order at 30,000–200,000 pieces |
| Cost structure | Base clear jar + RMB 0.5–1.1 (≈USD 0.07–0.15) per jar for the coat; screen print +≈USD 0.014/colour | Colour priced into the glass itself; premium varies by furnace and colour (typical partner-factory range, quoted per project) |
| Factory-gate lead time | Sprayed samples 10–14 days; run 30–40 days after approval; ≈60 quoted, ≈78 buffered with a glass run | 30–60 days per furnace run, scheduled to the campaign calendar; colour changes planned weeks ahead |
| Colour freedom | Any tone, matched to a golden sample; soft-touch, gradient, translucent all possible | Limited to what the melt produces; black, amber, green, opal, cobalt; matte needs frosting or a coat on top |
| Finish durability | Coating tested to 3M 810 cross-hatch (no lift), pencil hardness ≥2H, 75% ethanol 12 h migration; can scuff if under-specified | Colour is the glass: cannot chip, lift or migrate; surface as durable as any glass |
| Interior | Uncoated inert glass; coating exterior only | Inert glass throughout |
| Recycling | Coated glass; sorters treat by colour and coating — check the local scheme | Mono-material coloured glass; recycled with the coloured-glass stream |
Cost: a per-piece add-on versus a furnace decision
The sprayed route is easy to price because it is additive. Take the stock clear jar, add roughly RMB 0.5–1.1 per jar for the coating depending on area and how hard the tone is to match, add about RMB 0.1 per colour for a screen-printed logo and RMB 0.4 per design for a hot stamp, and keep print plus stamp to no more than two passes. There is no tooling. The decorator's set-up is spread across the 2,000–5,000 pieces of your run, which is why the floor is where it is.
Coloured glass has no add-on line because the colour is not added; it is the glass. The premium is inside the unit price and depends on the furnace, the colourant and the campaign length, so it is quoted per project rather than published as a range. What is published is the condition attached to it: a furnace runs continuously, and a colour that is not already in its campaign must justify a changeover, which is the 30,000–200,000 piece made-to-order floor. Amber, green and opal (milk) glass are the exceptions — they are standard coloured grades that glassworks stock in common shapes, so a brand can buy amber jars at stock floors. Black in the melt is not a stock tint at most glassworks, and a brief that says "black glass, 3,000 pieces" is a brief for a sprayed jar.
MOQ and lead time
For a launch, the arithmetic is one-sided. A sprayed black jar at 2,000–5,000 pieces per shape lands inside the published industry floor of 5,000–10,000 for cosmetic packaging, and a matched sprayed lid is a second set-up at the same floor. Coloured glass in a non-stock tint starts at 30,000 pieces per shape and often more. Sprayed is 10–14 days of samples then 30–40 days of production, about 60 quoted and 78 buffered with a glass run; coloured glass is 30–60 days per run, but only when the furnace schedule reaches your colour. The full route table is in matte black glass jars at low MOQ and the days on the lead time index.
Durability: a coating you test versus a colour you cannot lose
This is the one factor where coloured glass wins outright. Its colour cannot chip, scuff, lift or migrate because there is no film. A sprayed coating can do all of those if under-specified, which is why it is signed against physical tests before the sprayed sample becomes the golden sample.
| Property | Sprayed black: test and threshold | Coloured glass |
|---|---|---|
| Adhesion | 3M 810 tape over 2 mm cross-hatch, 10 passes, 45° pull: no lift; grade 1 or better (GB/T 9286) | Not applicable — no film |
| Hardness and scuff | Pencil hardness ≥2H (GB/T 6739); 75% alcohol cloth, one pass, no damage; soft-touch anti-fingerprint top coat recommended | Glass surface; fingerprints show on gloss black as on any gloss glass |
| Chemical resistance | 75% ethanol at 48°C for 12 h: no colour into the solvent, no softening | Inert |
| Thermal cycling, filled | 48°C 48 h and −15°C 48 h: no coating change after recovery | Same cycle; checks the glass and lid only |
| Film defects | Visual under 500–550 lux for the 16 named defects (pinholes, orange peel, sagging, cissing, peeling…) | Glass defects only: stones over 1 mm rejected, specks and bubbles 1–2 of Ø ≤0.5 mm on the A face |
| Glass integrity, both routes | Thermal shock GB/T 4547; annealing GB 4545 on a polariscope; 1.5 m drop at 45° filled; transit breakage ≤0.3% | Same |
A properly specified sprayed jar passes all of this and lasts the life of the product; the point is that it has to be specified and tested, whereas coloured glass arrives with the durability built in. The thirteen finishing processes and their limits are on decoration process comparison; the glass grades — flint, high-flint, super-flint, crystal-white and the amber, green and opal coloured grades — and their defect limits are on glass bottle specifications.
Which to choose
- Sprayed if the order is under about 10,000 pieces, the range needs one matched black across jars, bottles and lids, the look is matte or soft-touch, or the brand may change tone next year.
- Coloured glass if the programme runs tens of thousands per shape, the tint is a stock one (amber for UV protection of oils and actives; opal for a milk-glass look), or a mono-material, coating-free jar is part of the brand's sustainability story.
Whichever route, the jar is a jar: brim-full ±5% and the fill line both on the drawing, seal tested at −0.06 MPa, torque 0.2–0.7 N·m, and the cream confirmed in the assembled jar at 48°C for 30 days — see the QC standards page. Minimums for every glass route are on the MOQ index, and the questions that establish whether a supplier's "black glass" is sprayed or melted are in how to evaluate a China packaging supplier.
Vella is a Guangzhou-based beauty packaging solutions provider — a sourcing partner working with vetted partner factories operating to ISO 22716 / GMP — and quotes both routes with the real minimum per component so the choice is made on numbers. The sprayed format is on matte black glass jars, stock coloured grades on glass bottles, and a black range across formats on skincare packaging solutions.
Frequently asked
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- Frosted vs Amber vs Clear Glass for a Serum Bottle: Protection, Decoration MOQ and Cost
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