Home Cosmetic Science Talk Formulating tiny bubble on the finished product

  • tiny bubble on the finished product

    Posted by angelz on January 9, 2016 at 3:12 pm
    hi, i was making a 400 g cream, after i finished, i notice many “tiny
    bubble” on the surface of the cream.. i mean every time i take some with
    my finger, i can see the “tiny bubble” on the surface.. i want the
    finished product look smooth, no bubble at all

    i think it was
    from the cooling down phase (active / fragrance)…. but the ingredient
    from the cooling down phase cant put to the heated phase..

    or is
    it because the mixer ? i use high shear for all the preparation
    including the cooling down phase at 55oC after that i use slow speed at
    100rpm until the cream reach room temperature

    help me make the finished product no more tiny bubble..

    here is my recipe :

    water                    ad 100
    Niacinamide          3%
    Disodium EDTA     0.1%
    carbomer 940        0.25%

    isopropyl myristat  3%
    dimetichone          0.25%
    polawax                4%
    lipomulse              1%

    cooling down :
    DMDM hydantoin   0.5%
    aloevera extract     3%
    papaya extract      2%
    apple extract         1%
    fragrance               0.05%
    TEA                     0.4%

    here is the picture of the bubble..

    charmer replied 8 years, 2 months ago 6 Members · 7 Replies
  • 7 Replies
  • belassi

    Member
    January 9, 2016 at 5:39 pm

    0.5% is the normal limit for papaya extract. You’re making a carbomer cream, not surprising you are getting trapped bubbles. Not a problem as long as you dispense by weight. If you can dispense at 50C then you should find the problem much reduced.

  • crisbaysauli

    Member
    January 12, 2016 at 4:53 am

    Silicones are good bubble bursters. If you have the time, you might want to increase dimethicone to improve the appearance of your emulsion.

  • charmer

    Member
    January 13, 2016 at 1:44 pm

    WITH GREAT AMOUNT THE PROBLEM WILL BE RESOLVED

  • angelz

    Member
    January 17, 2016 at 3:59 pm

    @crisbaysauli how much % dimethicone you suggest ?

    @charmer how much amount do you suggest ?

  • student54

    Member
    January 18, 2016 at 11:41 am

    You could be right regarding the mixer issue.  Also, it’s hard to get a reliable sample from less than 500 grams.  I don’t know how many grams your sample size is.  You may try to mix moderately (Not High Mixing) and make sure that the head of the mixer is in the bulk of the sample (not on the surface)

  • markbroussard

    Member
    January 18, 2016 at 2:07 pm

    @angelz:

    You’re getting air trapped in the sample from the homogenizer head.  As Student54 said, make a much larger batch, perhaps 1000 grams and make certain your homogenizer head is well below the surface of the liquid.
    DO NOT use the homogenizer after you add the TEA to activate the Carbomer.  Instead, switch to a paddle stirrer.  This should help substantially in reducing the trapped bubbles.
  • charmer

    Member
    January 21, 2016 at 10:03 am

    +100 KG

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