Home Cosmetic Science Talk Formulating General Filling cosmetics bottles to the top: bad idea?

  • Filling cosmetics bottles to the top: bad idea?

    Posted by Bluebird on November 12, 2023 at 4:35 am

    If I buy an empty plastic cosmetics bottle, it almost always has quite a lot more space than marked.

    For ex, an empty plastic cosmetics bottle marked as for 30mL could be filled to 40mL and still had ~0.5cm-1cm space left.

    Is it OK to fill almost to the top or is there any reason to leave so much space at the top?

    My contents are not expected to ferment and create expansive air or such.

    mikethair replied 5 months, 3 weeks ago 4 Members · 5 Replies
  • 5 Replies
  • Microformulation

    November 12, 2023 at 1:40 pm

    You fill it to the declared weight/volume on the front panel of the label, not visually. You can easily calculate a check weight. In Commercial manufacturing, we will perform check weights every X number of times for QC.

  • PhilGeis

    November 12, 2023 at 3:50 pm

    Net contents must be right per MAV - not under or overfill.

    Don’t want product squeezed lout merely holding the bottle.

  • mikethair

    December 10, 2023 at 2:28 am

    In our factory, we did just that, buy and fill bottles. In our approach, we took into account a few considerations.

    First, was the visual appearance of the filled bottle. We tried a few variations and chose what looked best. So, not too full, not too empty looking.

    Next, we declared the weight/volume on the front panel of the label. In our manufacturing, this then became the focus of our QC checks.

    All of these parameters need to be well documented and put into your QC and production documents for your manufacturing and QC Manager.

    And one point I forgot. We were exporting globally, initially, so we put the bottles through several temperature regimes to check that with heat the contents were not expanding to the extent that the bottle seals were being compromised.

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