Home Cosmetic Science Talk Formulating Percentage Formula

  • Percentage Formula

    Posted by peter on January 30, 2016 at 12:50 pm

    Please I need a book or someone to teach me how to calculate percentage formula when using chemicals in formulating.

    Thanks,

    Peter.
    bobzchemist replied 7 years, 11 months ago 4 Members · 6 Replies
  • 6 Replies
  • markbroussard

    Member
    January 30, 2016 at 1:14 pm

    @Peter,

    It is very simple.  All percentages are based on weight, in grams, of ingredients in the mixture:
    When you are just learning, it is best to stick to making batches that are units of 100.  Let’s assume you make a 100 gram batch …
    Water 73.0 grams  (72%)
    Aloe Vera Powder   0.5 grams (0,5%)
    Propanediol                               6.0 grams (6.0%)
    Glycol Acid                           10.0 grams (10.0%
    Active Ingredient X                    4.0 grams (4.0%)
    Active Ingredient Y                    6.5 grams (6.5%)
    Preservative                              1.5 grams (1.5%)
    Fragrance                                  0.5 grams (0.5%)

    Total                                         100.0 grams

  • oldperry

    Member
    January 30, 2016 at 5:22 pm

    I would add that if you have your measurements in volume (say cups or ounces) you need to convert them to grams and then do the % calculation.

    To get mass from volume you need to multiply the density of the liquid by the volume.
  • bobzchemist

    Member
    January 31, 2016 at 2:51 pm
  • peter

    Member
    February 8, 2016 at 9:47 am

    It is a great help. Thanks very much to you all.

    Peter.
  • Anonymous

    Guest
    April 6, 2016 at 7:07 am

    Any one tell me in hand wash liquid I use als and Sles and SLS nacl not working. It down viscosity. Why

  • bobzchemist

    Member
    April 6, 2016 at 1:50 pm

    Please start a new discussion

Log in to reply.