Home Cosmetic Science Talk Formulating Can this be made at home?


  • Can this be made at home?

    Posted by Macink on August 5, 2022 at 12:31 pm


    I want to make a Calamine type basic lotion, my formula for this is below:

    Rose Hydrosol= 70.5 g
    Xanthan Gum= 0.8g
    Sodium Citrate= 0.5g
    Glycerine = 5g
    Calamine = 15g
    Zinc Oxide = 5g
    Bentonite = 3g

    As the calamine, zinc and bentonite come in powder form would this need to be sterilized somehow before it is added to the formula? 

    In the original calamine formula Liquid Phenol is used but I don’t want to use this. So I am unsure what preservative I could use for this.

    Any help would greatly appreciated



    Macink replied 1 year, 11 months ago 2 Members · 3 Replies
  • 3 Replies
  • chemicalmatt

    August 5, 2022 at 2:39 pm

    @Macink You got a little redundancy there: calamine is nearly all zinc oxide, so why add more zinc oxide? To answer the question though: lots of preservatives will do this. If you have no misgivings, add diazolidinyl urea, DMDM hydantoin, methylparaben, iodopropynyl butylcarbamate…the world is  your oyster depending on your location.   No need to sterilize, just heat mixture above 55C and keep it there for 60 minutes, then cool and add your preservative. Dr. Phil Geis can weigh in here too.

  • Macink

    August 5, 2022 at 7:26 pm

    Hi chemicalmatt thanks for your advise. Would it really need to be kept at 55c for 60 minute’s? seems like a long time. 
    I was thinking of using this machine to make it https://www.vevor.co.uk/magnetic-stirrer-c_11062/vevor-hot-plate-magnetic-stirrer-lab-magnetic-stirrer2000rpm-5lmax-608-f-320-c-p_010834539919

  • Macink

    August 7, 2022 at 2:06 pm

    chemicalmatt  Would a magnetic stirrer be capable of making this? thanks 

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