Why does the format come before the wax?

The format fixes how hard the set has to be and how it cools, and those decide which wax works. Choosing the wax first leaves the format as whatever that wax will tolerate.

Can a clamshell use a softer set?

Yes. The pack is rigid and the melt sets in place, so the unit never has to survive handling on its own, which allows a softer set than a loose product needs.

Why is a bar harder to get right?

The snap line is a mould decision. A bar that tears instead of snapping along the score is a complaint, not a variant, so the mould has to be right the first time.

How much fragrance can a melt hold?

Melts carry more fragrance than a container candle, but the ceiling depends on the wax and has to be tested at the load you intend to sell, on the wax you intend to use, rather than assumed.

What should I test on a sample?

Demould it in your own filling room, release it by hand to check the edge, leave one unit somewhere warm for a few days to catch sweating, and smell it cold because cold throw is what sells off the shelf.

What is the minimum order?

MOQ is quoted per project against your volume rather than as a blanket number.

Wax Melt Formats: Clamshell, Tart or Bar

A wax melt has no wick and is warmed rather than burned, so the format it is sold in decides more of the specification than buyers expect. The format decides how hard the set has to be, how the unit survives shipping, and how it is displayed — all before the wax is chosen.

This covers the three formats that cover most retail programmes, and what changes in the spec for each.

Why the format comes first

A melt that releases cleanly from a clamshell with sharp edges is a different specification from one that has to hold its shape loose in a box, and both are different from a bar that the customer breaks themselves.

Work backwards from the shelf: the format fixes the set hardness and the cooling, the cooling fixes the wax behaviour, and only then does the fragrance load get tested against that combination. Choose the wax first and the format becomes whatever that wax will tolerate.

Clamshell: the format that protects itself

A clamshell is the retail pack and the mould at the same time. The melt is poured into the cavity, set in place, and shipped in that same container, so the unit never has to survive handling on its own.

It carries a label and a barcode without extra packaging.
It stacks and hangs, which is what a shop fixture wants.
Because the pack is rigid, the set can be softer than a loose product needs to be.

The trade-off is unit cost: the clamshell is a consumable you buy with every melt.

Tart and cube: sold loose, so the set carries the load

When melts are sold by weight out of a bulk box — a PVC box or a bag — the individual piece has to survive being poured, weighed and bagged. That pushes the specification towards a harder set and cleaner demould, and it usually means a simpler shape.

Lower pack cost per unit, higher demand on the wax.
The customer sees the piece, not a pack, so surface finish matters more.
Weighing and bagging is labour you carry instead of the moulder.

Bar and break-your-own: the premium format

A bar is a large single piece the customer snaps along scored lines. It reads as a gift and it uses less packaging per gram, but the snap line is a mould decision that has to be right the first time — a bar that tears instead of snapping is a complaint, not a variant.

What the format changes in the specification

Set hardness, which is the property that decides whether the piece demoulds cleanly and travels.
Fragrance load, which has to be tested at the level you intend to sell, on the wax you intend to use. Melts carry more fragrance than a container candle, and the wax has to hold it without weeping or turning soft.
Cooling and shrink, because a deep cavity cools at a different rate from a thin bar, and the surface shows it.
Colour consistency, which is far more visible on a bare piece than inside a jar.

What to check on samples

Demould in your own environment, at the temperature your filling room actually runs at.
Snap or release by hand, not just visually. A clean edge is the test.
Leave one unit in a warm place for a few days — melts that sweat in transit are usually the ones that looked perfect in the sample tin.
Smell it cold, not hot. Cold throw is what sells the unit off the shelf; hot throw is what brings the customer back.

What to put in the RFQ

The format: clamshell, loose cube, tart, or bar
The unit weight you are selling at
The fragrance brief, and whether it is a stock scent or compounded to your profile
Packaging: retail clamshell, bulk PVC box, or your own pack
Monthly volume, and whether the range is seasonal

Send that and the format recommendation comes back with the price rather than after it. Reply within 24 hours by WhatsApp or phone at +86 133 8403 0866, or by email to kris@posision.com. The sourcing guide for melt wax covers how the wax itself is chosen, which is the step after this one. Free samples ship with the batch COA. Send an RFQ with your format and unit weight.

Wax Melts at Retail: Clamshell, Tart or Bar