What is cosmetic applicator tip cavity geometry?
Tip face is the contact surface that meets skin or packaging; the edge is the perimeter that controls shear and spread; a cavity or reservoir is any recessed volume that holds formula for transfer. Together they describe tip geometry for OEM sampling—not a material certificate. Confirm face size, edge profile and whether a cavity is present on a physical sample with your formula. For shape silhouettes, also read the tip shapes guide.
| Contact geometry | PRETTY starting reference | What to confirm on the sample |
|---|---|---|
| Flat bristled edge | CAT-p043-pair — two flat brush profiles | Working width, exposed length and surface contact with your formula |
| Unequal oval tips | CAT-p047-r1c1 — dual-ended oval applicator | Role and dimensions of each end; density and flexibility |
| Rounded dual silicone tips | UP049 — lavender dual-ended applicator | Drawing sizes: 18 mm large tip / 9 mm small tip; formula placement on each end |
| Broad paddle / capped tip | EN022 paddle and capped-tool references | Contact material identity, usable length, cap clearance and cleaning access |
Define tip face before you talk about cavity.
Tip face is the contact surface that meets skin or packaging. Record face size or diameter, whether the face is flat, domed or angled, and the job (place, spread, detail). UP049’s drawing lists an 18 mm large tip and a 9 mm small tip—use those as comparison starting points for face size, not as a universal cavity standard.
Edge behaviour controls shear and finish.
The edge is the perimeter of the tip face. A sharper edge can cut a cleaner line; a softer radius spreads more readily. Edge behaviour is a sample property under your formula and pressure—it is not proven by colour or a marketing silhouette. Note edge feel separately from face size in the brief.
Cavity / reservoir: only when dosing volume matters.
A cavity or reservoir is a recessed volume that can hold formula for transfer. It matters most on moulded silicone or foam tips where you care about dose consistency. Many bristled applicator edges have no moulded cavity—do not invent one on the brief. If you need a reservoir, say so explicitly and compare pickup, drip, residue and cleaning on the sample. This page does not publish cavity depth millimetres; agree those on the drawing and approved sample.
How tip geometry affects formula and wear tests.
Use the same product and amount when comparing tips. Record loading/pickup, placement control, streaking, residue on the tip, and cleaning access into any cavity. Flexibility and surface finish change results; repeat after the agreed care routine if that is part of the specification.
What to send PRETTY for an OEM tip sample.
Include the numbered reference (for example UP049, CAT-p043-pair or CAT-p047-r1c1), formula, preferred contact material, tip face size per end, whether a cavity/reservoir is required, edge preference, quantity in pieces or sets, logo, packaging, destination and target arrival window. Typical MOQ guidance is 1,000 pieces or 500 sets. Development samples are free—confirm category and fee after the brief via project. Browse the applicators category and the tip shapes guide.
Technical references & scope
Sources & scope
The PRETTY records below support the product references in this guide. They are not independent certification, capacity verification or order-specific test results.
Tip cavity sample FAQ
What belongs in a tip cavity geometry sample brief?
Define the applicator task and formula, tip face size, edge behaviour, whether you need a cavity/reservoir, any catalogue reference, and quantity in pieces or sets. Typical MOQ is 1,000 pcs / 500 sets. Pickup, residue and cleaning are confirmed on a development sample.
What should I include in a sample brief?
Share a reference (idea, drawing, photo or numbered design), quantity in pieces or sets, logo/colour/packaging notes if known, destination market and any target arrival window. Typical MOQ is 1,000 pieces per brush design or 500 sets. Development samples are free. A rough brief is enough to start on the project page.
Plan your next step
Ready to discuss your project?
Tell us which brushes you want to develop, how they will be used and what you would like to customise. Add the points from this guide to your enquiry so we can review the specification and sample requirements with you.
Tell PRETTY the placement or spreading task, formula and preferred tip geometry. Start from an applicator reference below, then include tip sizes, contact material and packaging clearance in the sample brief.
Develop your applicator tip with PRETTY →Compare applicator tip referencesApply this to your product brief.
UP049 documents an 18 mm large tip and a 9 mm small tip on one lavender dual-ended silicone body—use those sizes as a comparison starting point, not as a universal tip standard.