Foaming quality of liquid handwash

We are formulating sulphate based liquid hand wash and have developed two formulations as given below. The observations and problems encountered are presented for discussion and suggestion for improvement.

 Formulation “A”

Ingradients

Quantity

% as active matter

Aqua

149.5 g

QS

Sodium Laureth Sulfate, 27%

64.8 g

7 %

Sodium Lauryl Sulfate, 98%

7.7 g

3 %

CAPB, 30%

16.7 g

2 %

Coco DEA, Pure

2.5 g

1 %

Glycerin, 98%

5.1 g

2 %

EDTA

0.3 g

0.1 %

PQ7

0.3 g

0.1 %

Citric acid

0.3 g

0.1 %

Sodium chloride, 98%

2.6 g

1 %

DMDM Hydantoin

0.3 g

0.1 %

Sodium benzoate, pure

0.3 g

0.1 %

SLES : SLS (As active matter) = 7 : 3

Total sulfates (Active) : CAPB : CDEA = 1 : 0.2 : 0.1

 

Observation for “A”: Foam is not satisfactory, bubble size is small and poor foam stability.

Formulation “B”

Ingradients

Quantity

% as active matter

Aqua

61.6 g

QS

Sodium Laureth Sulfate, 28%

20.2 g

5.6 %

Sodium Lauryl Sulfate, 85%

2.8 g

2.4 %

CAPB, 28%

11.5 g

3.2 %

Coco DEA, 85%

1.9 g

1.6 %

Glycerin, 98%

1.6 g

1.6 %

EDTA, Pure

0.1 g

0.1 %

Citric acid, Pure

0.1 g

0.1 %

DMDM Hydantoin, Pure

0.1 g

0.1 %

Sodium benzoate, pure

0.1 g

0.1 %

SLES : SLS (As active matter) = 7 : 3

Total sulfates (Active) : CAPB : CDEA = 1 : 0.4 : 0.2

 

Observation for “B”: Foam is improved as compared to “A” but still less than standard market product, bubble size is small and poor foam stability. Product was sufficiently viscous, hence, sodium chloride addition was not required.  

Comments

  • Please review the formulation and suggest the changes.
  • @himansh_20 Just by reducing or removing Glycerin from your formula (since it doesn't do much in a rinse-off product other than maybe help with clarity) you'll improve foam. Another thing you can do is adding an Amine oxide, which will improve your foaming behavior. Increasing CAPB and DEA will also imrpove foam density and stability.
  • BelassiBelassi Member, PCF student
    The formulations are not expressed in proper percentages. I really haven't the inclination to do all the calculations for you.
    Cosmetic Brand Creation. Concept to name to IMPI search to logo and brand registration. In-house graphic design inc. Pantone specs. Cosmetic label and box design & graphics.
  • Thank Mr Belassi. I am repeating the formulation property for your review and expert opinion.
    SLES, acive matter 5.6 % SLS, active matter 2.4 %
    CAPB, active matter 3.2%
    CDEA, Active  1.6 %
    Glycerin 1.6 %
    EDTA 0.1 %
    Citric acid 0.1 %
    DMDM Hydantoin, 0.1 %
    Sodium benzoate, 0.1 %

    SLES : SLS = 7 : 3
    Total sulfates : CAPB : CDEA = 1 : 0.4 : 0.2
  • ketchito said:
    @himansh_20 Just by reducing or removing Glycerin from your formula (since it doesn't do much in a rinse-off product other than maybe help with clarity) you'll improve foam. Another thing you can do is adding an Amine oxide, which will improve your foaming behavior. Increasing CAPB and DEA will also imrpove foam density and stability.
    Thank you very much for kind opinion. 

  • Belassi said:
    The formulations are not expressed in proper percentages. I really haven't the inclination to do all the calculations for you.
    SLES (Liquid 28%) 20.4 g  
    SLS powder 2.8 g
    CAPB (Liquid 28%) 11.5 g
    Coco DEA (Liquid)1.9 g
    Glycerin 1.6 g
    EDTA 0.1 g
    Citric acid 0.1 g
    DMDM Hydantoin 0.1 g
    Sodium benzoate 0.1 g
    Aqua QS to 100 gram

    Mr Belassi, would you please review this formulation and suggest for improving foaming quality.
  • amitvedakaramitvedakar Member
    edited October 28
    still wrong.
    you have to mention how much you add ingredient in 100 gm handwash. (%).
  • Benz3neBenz3ne Member
    edited October 28
    still wrong.
    you have to mention how much you add ingredient in 100 gm handwash. (%).
    Am I missing something? The ingredients are listed as grams per 100g (denoted by water qs to 100g). Wouldn't that then be the same as w/w%? 
    Edit: E.g. SLES. 
    (w(ingredient)/w(total)) *100 = w/w%.
    (20.4g/100g) * 100 = 20.4% w/w.
  • Benz3neBenz3ne Member
    edited October 28
    To OP - I'd also second dropping the % of glycerine. I've noted from my own trials that glycerine inclusion does inhibit foam production and lowers viscosity (typically). 
    Have you compared the surfactant blend in the standard market product to yours? Typically mixtures are SLES/CAPB only or sometimes include a little CDEA, so maybe just try those two and scale-up actives of those two to 12%, thicken with salt and see how the lather differs.
    You might actually have a preferable lather, but bubbles might be smaller. Or that you require a little more water to lather the product. 
    I've read into handwashes/bodywashes being up to around 20% actives, so you might want to experiment with concentration of actives, up from the ~13% you currently have.
    For records, I found that ~12% actives across an approximately 6:2:1 ratio (SLES:CAPB:CDEA) has lathered just fine, comparably to other marketed hand washes.
  • @himansh_20 i first wanted to make sulfate free products but it was not good. Then made sulfate products at least a hundred different formulas because i was afraid of sulfate and didn't wanted my product to be harsh.
    Here is what i learned.

    SLES is not harsh so don't be afraid of it. Use at least %10 active SLES if you want good foam.

    SLS is harsher than SLES and has less foam. So why use it? Remove this.

    CAPB isn't milder than SLES (in my experience may be because it has MCI/MI as preservative) and not only doesn't increase the foam but decrease it. So use it at %1 just for viscosity purpose.

    CDEA also just to shift the salt curve to left at %1

    Don't use glycerin

    Use pq7 at %3.3 or 2.2 (0.2, 0.3 active)

    Don't know about your preservatives and edta as i haven't used them.

    Here is my suggested formula from your available ingredients for good foam.

    SLES %10 active 
    CAPB %1 active 
    CDEA %1 active or don't use at all
    Pq7    %0.2 or 0.3 active

  • Thank you very much, Mr Abdullah.
  • Thanks Dr Abdullah. As per your advice, I omitted glycerine and prepared the handwash. It is giving excellent foaming.
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