Home Cosmetic Science Talk Formulating Color and makeup Colorants required for household and personal care products.

  • Colorants required for household and personal care products.

    Posted by MurtazaHakim on February 13, 2019 at 12:02 pm

    Good afternoon everyone. It is a pleasure being here on this forum.

    I have a doubt regarding the usage of colorants for making liquid hand soap, liquid dish-wash, liquid disinfectants etc. We are using food grade colorants in the manufacturing of aforementioned products (for e.g Carmoisine 20%). We are experiencing loss of color after a few days. The color of the product (for e.g liquid hand soap) either fades away or vanishes completely. Is it due to the fact that we are using food grade colorants ???

    I hope I get valuable suggestions for the above query.

    Gunther replied 5 years, 4 months ago 3 Members · 3 Replies
  • 3 Replies
  • belassi

    Member
    February 13, 2019 at 4:23 pm

    Is it due to the fact that we are using food grade colorants ?
    - Yes. You also need to test colours for stability under light. I once made a shampoo and used a combination of blue and red to get violet. I left a batch standing on a table and was amazed to see that when exposed to sunlight, the colour changed to turquoise in less than a minute.

  • MurtazaHakim

    Member
    February 13, 2019 at 6:00 pm

    Which colorants are we supposed to use actually in manufacturing these liquid handsoaps,dish-wash and disinfectants ???

  • Gunther

    Member
    February 13, 2019 at 7:06 pm

    Which colorants are we supposed to use actually in manufacturing these liquid handsoaps,dish-wash and disinfectants ???

    Find a commercial product with a similar hue that you like and read the label.
    Approved colors names usually begin with FD&C, and end in a mumber
    i.e. FD&C Blue No.1
    But make sure you check the latest regulations, since some of them have been restricted to certain %, or banned.

    IMO stay away from natural, vegetable based colors. They aren’t designed to last too long since food usually rottens much faster than cosmetics, even with preservatives.

    If you still decide to stick with natural colorants, you’ll need to conduct a lot of stability tests, and check for batch to batch consinstency.
    There’s no way around a lot of testing.

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