Article by: Perry Romanowski

Welcome to Day 28 of the 30 Days to Become a Better Cosmetic Chemist series

This 30 day challenge is all about giving you lessons and basic exercises that will improve your abilities as a cosmetic chemist. scientist apply makeup

Get your copy of the Become a Better Cosmetic Chemist workbook

In this episode

In today’s program we cover product testing and how you can become an expert evaluator of the personal care products you create.

In this episode you’ll learn:

  • Why you should test your own products
  • How personal evaluations can direct your revisions
  • What product use can teach you about raw materials
  • 8 step process for evaluating cosmetic prototypes

Today’s challenge

Run a blinded test on two different products. For example, go get a sample of a low-cost shampoo or body wash and another sample of a similar smelling higher priced product. Or you can use your own formulas and compare them to a market leader. First use the product and write down scores for the characteristics we talked about earlier in this show. If you are testing a hair product make notes about the different aspects of the foam and how well your hair feels and combs after your done. Give your prototype and the benchmark scores for each characteristic. Then see if you can tell any differences. See if you can reduce the cost of one of your formulas by 10%.

When you’ve completed the challenge come over to the show notes and leave a comment about your experience.

TAGS:30 days


  1. Avatar
    Ayman Baydoun

    Thank you for all your efforts.
    I was very pleased with your curriculum.

  2. Avatar
    Mehroz Kalim

    I jst want to know what are the possible quality control test for semi solid(like creams, ointment and gel)…

    1. Avatar
      Perry Romanowski

      Viscosity measurements. Penetration measurements. pH

  3. Avatar
    Md Saiful Islam Khan

    I will set up a small cosmetics company and I want to make low cost good quality cosmetics items.Your support will be highly
    Thanks and best regards
    Saif Khan

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