Scaling up from pilot batch (Water content)

Does anyone have an opinion on increasing the water content in your personal care product for heated water phases?

Ex...

(LAB BATCH 500g)
water 83.65%
edta 0.10%
glycerine 5%
TEA 0.25%
--------------

Olive oil 5%
Stearic Acid 4%
Cetyl alcohol 2%

(SCALE UP BATCH 200 pounds)
water 83.65% ---> increase water percent by 1-2% to account for evaporation water loss???

edta 0.10%
glycerine 5%
TEA 0.25%
--------------

Olive oil 5%
Stearic Acid 4%
Cetyl alcohol 2%

Thanks Community.

Comments

  • GuntherGunther Member
    You don't have any proper emulsifier there so water and oil phases will quickly separate.
    I doubt 4% TEA stearate can emulsify 5% olive oil and 2% cetyl alcohol.
  • Good proportion for TEA stearate is 2:1, which means if you have 4% of stearic acid you need 2% of TEA not .25%
    4:2 should emulsify 10% oil phase.
  • MicroformulationMicroformulation Member, Professional Chemist
    Accounting for evaporative loss is part of process engineering. It is usually closely determined in a lab setting and extrapolated on a smaller scale. It is then refined over time by looking at yields. In perspective though, it is far less likely that you see a significant loss in a commercial setting if you are doing emulsions. In your case, it could be significant since you are essentially saponifying the oils with TEA.
    markfuller@microformulation.com Microformulation.com Microformulation Cosmetic Consulting provides Custom Formulations for both large Commercial accounts as well as smaller entrepreneurs. We can provide Naturally compliant Formulations under the NSF, NPA, Whole Foods and USDA Organic Certifications.
  • GuntherGunther Member
    All tanks should have some volume markings, in order to fill them up to the desired volume as to compensate for evaporation losses.
    That's why most formulas mention q.s. to 100%

    In large stainless steel tanks, height and diameter are usually measured, do some math, and weld or solder some protuding marks.
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