Cosmetic Science Talk

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  • Dual layer cosmetic product

    Posted by ashish on January 4, 2016 at 6:29 am

    I am thinking to develop a dual layer cosmetic product (cream, lotion or face cleanser or other suitable category). If anybody is having an experience or any suggestion related to it, please share & i would like to mention here that i have done literature survey for this but unfortunately i didn’t find much useful info even though there is not much market presence of such products. I also have a question that :
    1. Which kind of chemistry does behind such a dual layer technology?
    2. Is it a difference between specific gravity of each layer or related to miscibility?
    3. Is it a role of filling technique of such a product behind it?

    Note - Dual layer cosmetic means, product should discharge from nozzle of the tube in two colors or one layer should be transparent & other creamy like.

    johnb replied 6 years, 5 months ago 7 Members · 11 Replies
  • 11 Replies
  • Bill_Toge

    January 4, 2016 at 3:34 pm

    you seem to be describing two very different things here

    do you mean a product that exists as two separate liquids inside the bottle, and that you shake before use, e.g. Dentyl pH mouthwash?

    or do you mean something like striped toothpaste?

  • RobertG

    January 4, 2016 at 4:28 pm

    If it’s like Stripe toothpaste, discharging from the neck of a tube, then it’s done by filling 2 tubes that are then laid side by side to dispense thru a neck with a septum.

  • ashish

    January 5, 2016 at 4:25 am

    I mean, two separate liquids or semi solids inside tube or bottle.

  • ashish

    January 5, 2016 at 4:26 am

    Semi solids should not mix even by shaking.

  • ozgirl

    January 5, 2016 at 4:54 am

    Are you referring to something like this product?

    I’m not sure how it is done but it is very clever.

  • ashish

    January 5, 2016 at 6:02 am

    Somewhat same as mentioned by @ozgirl, i mean to say dual layer product discharge from one tube. Please refer -

  • David

    January 7, 2016 at 12:07 pm

    ashish - It is still not clear what you are talking about.(at least not for me) There is a huge difference between a double-action shower gel(which is more of a marketing trick since almost every cosmetic ingredient have more than one function) and actually having  physically two different products side by side in one bottle.

    @ozgirl - the link is not working - says out of stock
  • Iaskedbetter

    January 7, 2016 at 6:37 pm

    I am guessing OP is referring to something like this:

    Should this be the case, the answer to your question is a combination of filling technology and miscibility. The clear gel is aqueous and the colored swirls are hydrophobic (i.e. oil based gels, W/O emulsions, etc.). Each component is made separately and specialized filling equipment creates the swirl effect.
  • ozgirl

    January 7, 2016 at 9:00 pm

    Sorry about the link not working. The product I was referring to was the Garnier Ultra Lift 2 in 1 Serum + Moisturizer.

  • ashish

    January 8, 2016 at 7:33 am
  • ashish

    January 8, 2016 at 7:35 am

    Two immiscible layer in single tube or suitable container. for e.g. one yellow & other white or one transparent & other creamy.

  • johnb

    September 6, 2016 at 3:32 pm

    Many years ago there was a product (bath oil, I think) which had three separate layers. The product was quite useless but it looked good in the bathroom as the three layers were three different colours.

    I had a request for a five layer product to compete but the best we could manage was four - and we weren’t able to get a good enough colour difference between the layers.

    The layers comprised water bottom layer, light mineral oil for the middle and the top layer was a volatile silicone (cyclopentasiloxane). The colour was water soluble for the lower layer and oil (or rather silicone) soluble. By careful selection of colours there was a three colour system with the middle layer a combination of the upper and lower layers.

    Looked spectacular, especially after shaking and allowing to separate again but, as said above, totally useless.