Home Cosmetic Science Talk Formulating General What is your definition of…..

  • What is your definition of…..

    Posted by Stanley on July 19, 2021 at 10:42 pm

    silly question …
    I have seen plenty of heated discussions about what is colorless, clear, water like, white, straw, pale etc…

    Then having to understand the marketing definition (that normally doesn’t match the science definition) let alone the client’s can be more interesting

    Bill_Toge replied 3 years, 2 months ago 5 Members · 6 Replies
  • 6 Replies
  • MarkBroussard

    Member
    July 19, 2021 at 11:27 pm

    @Stanley:

    I would advise you to steer clear of such discussions because there is no one answer and frankly, it does not matter, unless your concoction is really visually unappealing.  

    If your product performs well and does its job, it’s going to end up being whatever color it needs to be to get the job done.  Now, if “clear” is a client criteria, I generally just have them show me a product that they consider to be “clear” and then make the appropriate ingredient selections with that in mind.

    The only defiinition that really matters is that of the person paying you to develop their product.  

  • OldPerry

    Member
    July 20, 2021 at 2:00 am

    Definition of clear?  I’d say it’s like water

  • chemicalmatt

    Member
    July 20, 2021 at 2:51 pm

    Clear we determine as minimum 90% transmission at 425nm in a spectrophotometer. Translucent is 65 - 90% transmission same wavelength. Below that you are semantically free to use whatever term you wish. I like “murky”. As for “straw” or “pale yellow” get thee to a Gardner Colorimeter machine my friend.

  • Stanley

    Member
    July 20, 2021 at 3:56 pm

    @MarkBroussard :)
    I love your answer… I don’t have contact with the client.  However marketing does but then they interject their thoughts….but for example… my marketing person keeps telling me they want the product clear.  I am thinking opaque vs. hazy vs. translucent vs. clear.   After much discussion them meant they didn’t want any color.  I just to make sure we are on the same page.

  • MarkBroussard

    Member
    July 20, 2021 at 5:04 pm

    @stanley:

    You encounter the same issues in developing a fragrance for a product.  I always have the client send me samples of fragranced products where they like the scents and for product clarity, etc.  Those types of definitions can mean different things to different people.  It saves a lot of time and back and forth if you do it that way.

    If someone tells me they want a clear product with a light floral scent … well, than can be quite a few different things.

  • Bill_Toge

    Member
    July 20, 2021 at 7:31 pm

    generally speaking, ‘clear’ means having a turbidity less than 10-15 NTU (Nephelometric Turbidity Units), which is about the average limit of perception

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