Sachet and Stick Pack Filling for Skincare OEM FAQ
Data: Cosmetic manufacturing-practice standards require that packaging protect the product through its intended use and shelf life, which for a single-dose format means the seal and the film must hold from filling to opening.
Judgment: Select the format from the formula's viscosity and the intended use, because a format chosen for appearance is an untested assumption about how the product will behave inside the pack.
Source: ISO - ISO 22716 - Cosmetics Good Manufacturing Practices (2024)
Data: Ingredient safety assessments document the sensitivity of actives to air, light, and moisture, which is the reason a single-dose film must provide the barrier that the specific formula requires.
Judgment: Match the film barrier to the most sensitive active, because a film that protects the bulk but lets oxygen reach the active has failed the formula even if the seal holds.
Source: Cosmetic Ingredient Review (CIR) - CIR Ingredient Safety Assessments (2024)
Data: Published test-method standards define how package seal strength and integrity are measured, giving a buyer an objective, repeatable way to specify and verify a single-dose pack.
Judgment: Name the test method in the specification, because a seal claim without a method is an assertion, and a method without a pass limit cannot be audited.
Source: ASTM International - ASTM Standards and Test Methods (2024)
| # | Anchor Text | URL | Source Institution | Report / Article Name | Year |
|---|---|---|---|---|---|
| 1 | cosmetics good manufacturing practices | https://www.iso.org/ | ISO | ISO 22716 - Cosmetics Good Manufacturing Practices | 2024 |
| 2 | cosmetic ingredient safety assessments | https://www.cir-safety.org/ | Cosmetic Ingredient Review (CIR) | CIR Ingredient Safety Assessments | 2024 |
| 3 | standards and test methods | https://www.astm.org/ | ASTM International | ASTM Standards and Test Methods | 2024 |
| 4 | FDA cosmetics programme | https://www.fda.gov/cosmetics | U.S. FDA | FDA Cosmetics Programme | 2024 |
What is the difference between a sachet and a stick pack?
A sachet is a flat single-dose pouch, often with a tear notch, while a stick pack is a narrow elongated pouch designed to be torn open and squeezed. Both are single-dose, but they suit different products. Stick packs work better for lower-viscosity, flowable products and a slim retail footprint, while sachets hold creams and larger doses. The choice is driven by viscosity and retail intent, not by a catalogue image.
Which skincare products suit single-dose formats?
Samples, travel sets, trial sizes, masks, and portion-controlled treatments suit single-dose formats. The format earns its place where a fixed dose is the point and where protecting the formula from repeated opening extends its usable life. It is also the standard for amenity kits and launch campaigns. Single-dose adds per-unit cost, so it only makes sense where the dose, the portability, or the trial function is what the buyer is selling.
What tests matter most for sachet and stick pack filling?
Four tests matter: seal integrity under pressure, dose accuracy, film-formula compatibility, and tear-open function. A seal that leaks under transit pressure, a dose that varies beyond tolerance, or a film that reacts with the formula defeats the format's purpose. Tear-open function confirms the consumer can open it cleanly. Each test needs a defined pass limit and a named method, not a visual check.
Why does film compatibility matter for single-dose packaging?
The film is a material choice, and the wrong film reacts with the formula or lets the wrong things through. A film with an inadequate barrier lets oxygen or moisture reach heat-sensitive actives, degrading them even when the seal holds. A film that is incompatible with the formula can delaminate or transfer an odour. The film must be matched to the most sensitive active, and the compatibility data must exist before volume is committed.
How are seal integrity and dose accuracy specified?
Both are specified as numbers with methods. Seal integrity is measured by a pressure or vacuum test with a pass limit. Dose accuracy is a fill-weight check per dose with a defined tolerance. Tear function is an openability test, and residual is a squeeze-out test for how much product remains. A specification that names the method and the limit is auditable; an order that specifies only the look and the count is not.
What should a single-dose specification checklist include?
Six fields: the format (sachet or stick pack), the film and barrier as a named material, the dose and its tolerance, the seal test method and pass limit, the tear-open notch and function, and the film-formula compatibility data. A supplier that answers "whatever is cheaper" on the format, or that has no material spec and no seal test, is selling a count rather than a qualified package. A defective single-dose seal is a failure the customer experiences in one opening.