In most cosmetic categories the pack is a container. In colour cosmetics the pack is part of the product. A pressed powder is a body of pigment held together by a pan inside a compact that is opened and closed twice a day for a year, and an eyeshadow is applied with the small sponge tip that comes with it. A brand that specifies the formula carefully and the pack casually is specifying half a product.
The pack decisions that create the most trouble are not the visible ones. The tray material, the glue behind the pan, the hinge life and the applicator geometry all interact with the formula and with the price, and all of them are harder to change after tooling than before it. This article covers the three parts of a colour pack that carry most of the risk, and the point in the project where each one has to be fixed.
The pan is a moulded part, not a dish
A pan looks like a shallow metal dish. In practice it is a dimensioned part with a depth, a diameter, a wall thickness, a base flatness and often a chamfer at the rim, and each of those interacts with the fill and with the press.
Depth decides how much formula the pan can hold and therefore how the pressed surface sits relative to the rim. A pan filled proud of the rim gives good brush access and a risk of chipping in transit; a pan filled below the rim protects the surface and makes the product awkward to pick up. The usual compromise is a fill level within a millimetre of the rim, with the tolerance written down, because a supplier left to choose will tend to overfill and a pan that is overfilled will dome.
The base has to be flat enough for the press and for the glue. A pan with a domed base rocks under pressure and produces a density gradient across the disc, which shows up months later as an uneven surface. Wall thickness matters for heat transfer during pressing and for how the pan behaves when it is removed for a refill. And the material matters for corrosion: an aluminium pan with a thin anodised finish can show pitting where a formula contains a chloride or an acidic component.
For a small brand, the pragmatic route is a stock pan from a supplier's catalogue, chosen by diameter and depth from a list of sizes that already have tooling. Custom pans are entirely possible and usually not worth it until volumes make the tooling cost irrelevant.
Hinges, clasps and the compact as a mechanism
A compact is opened and closed far more often than a bottle is. The hinge and the clasp therefore carry a mechanical specification, and the specification should be written in cycles rather than in adjectives.
A common target for a consumer compact is several thousand open and close cycles without a loss of clasp force or a cracked hinge, which is a demanding figure for a thin-wall moulding in a low-cost polymer. Two design choices dominate the outcome. The first is the hinge type: a living hinge in polypropylene can survive a very large number of cycles if the geometry is right and the material is correctly selected, and a pin hinge with metal inserts gives a different combination of cost, feel and durability. The second is the closure: a snap fit, a magnet or a push-button latch each produce a different opening force, and the force is what the customer feels first.
Clasp force also has a stability dimension. A tray or a latch that absorbs oil or fragrance will soften and lose force, and a component that loses force after six months in a warm warehouse produces complaints that are described as the compact not closing properly. Weighing filled units through an accelerated storage study answers this before it happens, because the weight gain or loss is an early indicator of what the polymer is doing.
Refillability has moved from a niche feature to a mainstream request, and it changes the design. A refillable compact needs a pan retention system that holds during use and releases deliberately, which usually means a metal pan in a plastic tray with a defined interference fit, and it needs the refill to be fillable on the same line as the original. The supply chain consequence is that the brand now manages two article numbers per shade and has to plan stock for both.
The applicator decides whether the formula performs
An applicator is designed against a formula, and the pairing is not interchangeable. The same eyeshadow on a firm flat brush and on a small sponge tip will look like two different products, and the brand will be judged on the second one because that is what is in the pack.
For pressed products the applicator decision comes down to geometry: the size of the tip relative to the pan, the firmness of the foam, and whether the surface is flocked or open-cell. A foam that is too firm scratches the pressed surface and lifts it unevenly; a foam that is too soft holds the powder and delivers very little. Flocking a sponge tip gives a softer pickup and a more forgiving edge, at a small cost increase.
For liquid formats the applicator is part of the metering system. A mascara brush has to comb and separate while holding enough product to coat; the wiper in the neck has to remove the excess so the brush delivers the right dose; and the two have to be developed together, because a brush designed without reference to the wiper will either deliver nothing or flood. The same logic applies to a doe-foot in a lip gloss and to a fine brush in a concealer: the dose is set by the combination, not by the component.
Bristle material affects both feel and complaints. Natural bristles give a characteristic softness and a variability between units, synthetic bristles are more consistent and can be tapered, and a mixed construction is common. The failure modes to write into a specification are shedding, scratch, and deformation after cleaning, each with an acceptance test that is quick enough to run on incoming goods.
Glue, magnetism and the two interactions to test
Holding a pan in a tray is a small engineering problem with an outsized failure mode, and the choice is usually between an adhesive, a magnetic layer or a mechanical retention.
An adhesive has to bond metal to polymer, set without releasing volatiles into the formula, and stay flexible enough that a small temperature change does not crack the bond. Hot-melt adhesives are fast and cheap and their temperature behaviour has to be checked against the shipping route, since a hot container can soften the bond and let the pan float. Pressure-sensitive adhesives are more forgiving in temperature and less forgiving in shear, which matters for a product that is pressed in use.
Magnetic retention is popular because a refill snaps in and out, but it introduces an interaction that is often missed: the magnetic layer has to be strong enough to hold the pan and weak enough that the pan can be removed by hand, and the field can influence how an iron oxide pigment settles in a liquid formula stored directly above it. Mechanical retention avoids both issues and constrains the design.
Two compatibility checks cover most of the risk. The first is a weight-change study on filled units at elevated temperature, which catches absorption and plasticiser migration. The second is a bond strength check on the pan before and after the storage study, which catches the adhesive failure that would otherwise appear as a loose pan in a customer's hand.
Decoration, print and where the lead time goes
The decorative finish on a compact is usually the longest lead time in the whole project, and it is the item most often underestimated by a first-time brand.
Hot stamping, silk screen, pad printing and in-mould decoration each have a minimum quantity, a plate or screen cost, and a colour-matching step that involves a physical proof. A compact with a hot-stamped logo in a metallic foil and an ingredient list printed on the base needs two processes, two setups and two approval cycles, and the approval cycles are what delay a launch rather than the manufacturing itself.
Decoration also interacts with durability. A foil on a surface that is handled daily will wear at the corners, which is expected and can be managed by keeping the decoration away from the contact points. A print on the base is subject to abrasion from a shelf and to solvent exposure from a spilled product, and the resistance requirement should be written into the specification rather than discovered from a returned unit.
Where labelling area is tight, which is the case on almost every colour pack, the ingredient list and the warnings usually move to a folded leaflet, an outer carton or a peel-back label. That is a legal decision as much as a design one, and it has to be made before the artwork is finalised because the space for it is part of the layout.
Colour packaging variables at a glance
| Variable | Typical position | What it controls | Failure sign if wrong |
|---|---|---|---|
| Pan depth and fill level | Fill within about 1 mm of the rim | Pick-up and transit protection | Domed surface, or a pan that is awkward to use |
| Pan base flatness | Flat enough not to rock under the press | Density through the disc | Uneven surface after a few months |
| Hinge type | Living hinge or pin hinge, chosen against cycle target | Opening feel and service life | Cracked hinge or a slack lid within a year |
| Clasp force | Specified in newtons, tested after storage | Whether the compact stays shut | Softening after absorbing oil or fragrance |
| Pan retention | Adhesive, magnetic or mechanical | Refill behaviour and pan security | Loose pan, or a refill that cannot be released |
| Applicator geometry | Matched to the pan or to the wiper | Dose and application result | Scratched surface, or a brush that floods |
| Decoration process | Chosen with the MOQ and the proof cycle | Lead time and unit cost | Launch delay rather than a defect |
| Labelling surface | Ingredient list to leaflet or carton if space is short | Compliance and layout | Artwork revision after plates are made |
Cost drivers and the minimum that matters
Colour packaging cost is driven by tooling, quantity and process count rather than by material weight, which is why the same compact can be priced very differently at two quantities.
A stock compact in a standard colour at a high quantity is a commodity. The same compact moulded in a custom colour, decorated with a foil logo and fitted with a mirror and a custom applicator is a project, with a mould cost, a colour minimum, a foil plate and a decoration minimum. The quantity at which a custom design becomes sensible depends on the volume of the whole range rather than of a single shade, and a brand launching eight shades should negotiate on the basis of the range.
Two minimum quantities usually bind first. The moulding minimum applies to the component, and the decoration minimum applies per colour and per process, so a range with eight shades and one shared pack is far more efficient than the same range spread across three pack designs. Before committing to a pack family, it is worth checking whether the applicator and the tray can be shared even if the closure cannot.
Freight is the third driver and it is often overlooked. A compact is bulky for its value, and a design with a deep tray or a bulky applicator spends money on shipping rather than on the product. Where a brand is comparing two similar designs, a volume calculation per thousand units is a faster way to a decision than a unit cost comparison.
What to put in the brief
The brief that avoids late changes names the parts that cannot be changed later, at the point where changing them is still cheap.
State the format and the fill weight, because those fix the pan. State whether the pack must be refillable, because that determines the retention system. State the decoration and how many colours it involves, because that sets the lead time. And state the quantity for the range rather than for one shade, because the minimums are negotiated at range level.
- The format and the fill weight per unit.
- Whether the pack is a stock component or a custom design.
- Whether it has to be refillable, and whether the refill is sold separately.
- The applicator type, and whether it is shared across the range.
- The decoration processes, the number of colours and the position of the logo.
- The hinge and clasp cycle target, stated as a number.
- The storage and shipping conditions the component has to tolerate.
- The total range quantity across all shades, which sets the minimum for each process.
Answering those eight lines before the tooling is cut is the difference between a pack that supports the formula and a pack that becomes the reason the launch moved.
Where our capability fits
We develop colour cosmetics with the pack designed as part of the product, so pan dimensions, retention, hinge and clasp targets and applicator geometry are fixed against the formula and against the climate the product will ship through. Component compatibility, pan bond strength and decoration durability are specified before tooling rather than checked after the first batch, which keeps the launch date on the print schedule instead of on an approval cycle.
We work with brands on private label (your brand on a proven base), OEM/ODM contract manufacturing, and full custom formula development — whichever matches where your brand is today. Our lines include a long-lasting waterproof foundation, a solid essence stick format and a colourful fragrance range, all of which rest on the same pan, closure and component compatibility disciplines that a colour pack programme needs.
Tell us the format, the range size and the finish you want, and we will map the pack options, the tooling route and the decoration schedule against your launch plan. Start at our inquiry page, email capsulebiotech@163.com, or message the right team on WhatsApp: Capsule Series (capsules only) +86 158-7655-5319, Cosmetics Series (serum, hair care, body care, fragrance) +86 158-7655-5319. Tooling is covered in our article on custom shapes, sticks and compacts, and pressed formats in our guide to compact and pressed powder production.
General manufacturing information, not regulatory or legal advice. Component requirements, labelling rules and material restrictions vary by market and by product.