Hair Wax with Charcoal and Koalin

My hair wax formulation is a basic emulsion type hair wax which contains 0.06% bamboo charcoal powder and 2% kaolin. You can refer to my formulation below. I have encountered few issues during scaling up to >20kg batch size.

1. Unable to achieve viscosity vs lab batch. I've tried adjusted the homogenization speed, time, and cooling rate.

2. Colour of the big batch size is much lighter than the lab batch. I have to adjust with another 0.06% charcoal to achieve the desired colour. However, the lab batch bulk colour looks more yellowish grey tone while bigger batch looks bluish grey tone. 100% sure it is not rinsability issue or inaccurate weighing. Tried total 0.12% of charcoal in the formulation 2nd time without post adding method, but the colour still came out lighter. Any idea why there is colour difference?

3. Realised there were lots of bubble created when kaolin was added into Carbopol Clear, which later realised it created lots of microbubble in the bulk, but eliminated most of the bubble by vacuuming. Anybody know if kaolin will have any reaction with any of the ingredients below?

Carbopol clear 0.1%
Kaolin 2%
Candelilia Wax 18%
Mineral oil 3%
Ethylhexyl Palmitate 6%
Stearic acid 0.5%
Cetyl Palmitate (and) Cera Alba (and) Cera Microcrystalline wax 0.5%
Beeswax 0.5%
Petroleum jelly 2%
Ceteth-20 8.4%
Sorbitan Stearate 3.6%
C16 cetyl alcohol
Bamboo charcoal powder 0.06%
Butylene glycol 3%
Propylene Glycol (and) Diazolidinyl Urea (and) Methylparaben (and) Propylparaben 1%
AMP 0.11%



Comments

  • Bill_TogeBill_Toge Member, Professional Chemist
    how big was the lab batch, and how big was the production batch?
    what temperature were the waxes and water mixed together at in the lab batch and the production batch?
    what's the maximum weight and smallest interval on the scales you weighed the materials for the lab batch on?
    in my experience, kaolin plays well with all of those materials
    UK based formulation chemist. Strongest subjects: hair styling, hair bleaches, hair dyes (oxidative and non-oxidative) I know some stuff about: EU regulations, emulsions (O/W and W/O), toothpaste, mouthwash, shampoos, other toiletries
  • Lab batch was 2kg, production batch was 20kg and 100kg.
    Temperature for emulsification was 80C for both lab and production batch.
    For the weighing machine, maximum is 320g, minimum is 0.02 g with 3 decimals.
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