One seemingly simple line on the label trips up many new brands: how much product is in the bottle. The label says 30 ml, then the importer finds the real fill is lower, or the unit does not suit the market. This guide explains net content for argan oil and how to check the fill before printing and shipping.
What is net content?
It is the amount of product inside the container, excluding the glass, dropper and cap. What you print is a promise to the buyer, and it can be compared with what the bottle actually holds. The figure should come from a measurement, not from the bottle capacity in a supplier catalogue.
ml or grams?
Liquid oils are often sold by volume (ml), but factories sometimes fill by weight because it is more precise. Rules on which unit is required vary by market, so do not assume. Ask your importer or the relevant authority in the destination country. See also our article on bilingual Arabic-English labels for Gulf markets.
Density links volume and weight
Argan oil is lighter than water. Its density is typically around 0.91 to 0.92 g/ml and varies slightly by batch and temperature. The table below is indicative only and does not replace measuring your own batch:
| Stated volume | Approximate oil weight |
|---|---|
| 30 ml | 27.3 – 27.6 g |
| 50 ml | 45.5 – 46 g |
| 100 ml | 91 – 92 g |
So 100 ml of oil is not 100 g. Printing 100 g on a bottle filled to 100 ml promises more than it contains.
Why the real fill differs from what you expect
- Bottle capacity is not fill volume: room is needed for the dropper or pump and for thermal expansion.
- The dropper displaces oil, so judging by eye misleads.
- Viscosity leaves a film in filling lines.
- Temperature changes volume slightly but not weight, which is why filling by weight can be more accurate.
- A fill tolerance exists: ask for the factory's figure and the one accepted in your market.
Practical verification steps
- Get a written fill specification: unit, target value, tolerance, method.
- Ask which density and reference temperature were used.
- Weigh at least ten filled bottles on an accurate scale.
- Weigh empty bottles to get net oil weight.
- Divide by density to get approximate volume and compare it with the printed figure.
- Record results with the batch number.
- Approve the final label after this check, not before.
Note that this is an internal check, not a substitute for the official method in your target market.
Linking to your order calculation
When you convert bottles into kilograms for a bulk order, you use the same density. If your assumption is off, your stock will not reconcile. See our guide on calculating how much argan oil you need.
FAQ
Should I print volume or weight?
It depends on the target market. Volume is common for liquids, but confirm with your importer before printing.
Can a 30 ml bottle hold 30 ml?
Not always; you need headspace. A slightly larger bottle is often chosen and tested with the dropper or pump.
Is a slightly lower fill acceptable?
Tolerance rules vary by market. Aim for a fill that matches or exceeds the label, within the margin the factory sets.
Does density change between batches?
Only slightly. Measure a sample from each batch.
Bottom line
Treat net content as a measured value written into the specification. Agree the unit and tolerance with the factory before approving the label. For a sample or pilot batch with a clear fill specification, request a quote from Assil Ouargane.
