Home Cosmetic Science Talk Formulating Scaling up a formula from 100g to 2,000g

  • Bubbles

    Member
    December 11, 2018 at 7:08 pm

    20

  • David

    Member
    December 11, 2018 at 7:58 pm
  • dtdang

    Member
    December 11, 2018 at 8:58 pm

    100×20 =2000

  • scelce

    Member
    December 11, 2018 at 9:38 pm
    Let’s say that I’m using a broad spectrum preservative at 1%, I would just multiply that by 20 and use 20% in the 2,000 g batch? 
  • ngarayeva001

    Member
    December 11, 2018 at 10:58 pm

    2,000 x 20% = 400. 

  • ngarayeva001

    Member
    December 11, 2018 at 10:58 pm

    Your formula should be for 100% not for 100 gr. Use MS Excel.

  • EVchem

    Member
    December 12, 2018 at 1:03 pm

    @scelce noooo 1%  means “1 part for every 100 parts”. 1% stays 1% no matter what batch size, it doesn’t become 20% when you scale up. That’s the beauty of percents!

    For a 100 gram scale, 1% of 100 is 1.
    For a 2,000g scale, there are 20 groups of 100 (20*100=2000), so you multiply by 20. 1% of 2,000 is 20.

  • doreen

    Member
    December 13, 2018 at 3:25 pm

    @scelce
    If you’re planning to make 100 gram batches and you want these to become 2 kilogram batches (2000 gram), you multiply the weights by 20 (20 x 100 gram = 2000 gram.)
    But a better way is to calculate straight from the percentages of your formula.

    • 1% of a preservative blend in a 100 gram batch can be calculated as follows:

    Total is 100% = 100 grams. 100/100 * 1 = 1 gram.

    • 1% of a preservative blend in a 2000 gram batch:

    Total is 100% = 2000 gram. 2000/100 * 1 = 20 grams.

  • microformulation

    Member
    December 13, 2018 at 8:35 pm
    Here is a video posted by @Perry that will give you a comprehensive review of wt./wt.% notation. https://chemistscorner.com/useful-formulating-spreadsheet/
    The link to the Excel Template he uses was also posted; https://chemistscorner.com/wp-content/uploads/Formula%20template.xls
    Using this notation ensures accuracy in the scale-up and over time becomes much easier.

    Useful Formulating Spreadsheet

  • em88

    Member
    December 19, 2018 at 8:11 am

    scelce said:

    I’m new to cosmetic formulating and I was wondering if I have a formula at 100g and wanted to scale up to 2,000g, do I just multiply the ingredients by 2,000? 

    This is very scary 

  • doreen

    Member
    December 19, 2018 at 9:00 am

    @em88
    Or this

    scelce said:

    Let’s say that I’m using a broad spectrum preservative at 1%, I would just multiply that by 20 and use 20% in the 2,000 g batch? 

    @scelce  
    Are our previous explanations helpful for you? Can we help you any further with the calculation of weight/percentages? 

  • em88

    Member
    December 19, 2018 at 10:39 am

    Doreen said:

    @em88
    Or this

    scelce said:

    Let’s say that I’m using a broad spectrum preservative at 1%, I would just multiply that by 20 and use 20% in the 2,000 g batch? 

    @scelce  
    Are our previous explanations helpful for you? Can we help you any further with the calculation of weight/percentages? 

    Indeed!

    @scelce  post your formula here and we will calculate it for you in grams for a 2000 g (2kg) batch. IMO this is a mandatory request, before you harm yourself/

  • vjay

    Member
    December 21, 2018 at 11:54 am

    Formulation wise you need to multiply by 20 but for process wise you need to monitor that how much time is require for heating and cooling , at how much RPM you need to emulsify your product, etc…, based on your experiance you need to modify your process.

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