Home Cosmetic Science Talk Formulating General manufacturing yield

  • manufacturing yield

    Posted by Stanley on January 26, 2022 at 4:22 pm

    I know this is simple but I am drawing a serious blank….

    If I need 3000 pieces of a product in a 0.5 oz component who do I compute my batch size?

    where does sp.g fit into this?

    Pattsi replied 2 years, 10 months ago 4 Members · 4 Replies
  • 4 Replies
  • OldPerry

    Member
    January 26, 2022 at 8:30 pm

    0.5 ounces/unit x 3000 units = 1500 ounces

    specific gravity is more related to whether you can fill a container of some certain size with a volume of product. 0.5 ounces of feathers is going to take up a lot more room than 0.5 ounces of hand cream.

  • Pattsi

    Member
    January 27, 2022 at 7:02 am

    Why not use Fluid Ounce.

  • mikethair

    Member
    January 28, 2022 at 2:49 am
    It’s the specific gravity issue that requires us to calibrate the container to be used by the customer before calculating the batch size and pricing.
    We use grams as the unit of measurement.
    And fluid ounces, a measure of volume…..no thanks. A PIA.
  • Pattsi

    Member
    January 28, 2022 at 6:13 am

    The finish product is filled by volume, for small lot like 3,000 units, I think it may be easier to estimate batch size by volume and translate back to grams in production, it is just my non-formulator opinion.

    I’m not in production team so I don’t know how they really calculate batch size but they would have specific gravity on hand and so they would know how many grams they need. 

    Speaking from client point of view, I once outsourced small bottle of perfume oil to be thank you gifts for our clients, at first I got a price quote by weight but they just used sp.g of 1, the cost per unit was really unreasonably high. So I request a new quote by volume which made the cost per unit acceptable.  

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