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Home Cosmetic Science Talk General Are Kitchen Hotplates Any Good?

  • ngarayeva001

    May 19, 2019 at 7:06 am

    I use a similar one. It overheats and you must keep your eye thermometers. It’s ok if you are a hobbyist but I wouldn’t use it in a lab. So the answer is, it does the job but it’s not great.

  • Dr Catherine Pratt

    May 19, 2019 at 8:07 am

    I still use magnetic stirrer hotplates using fleas, but then I am from the Jurassic period. I guess anything that works go for it.

  • Microformulation

    Professional Chemist / Formulator
    May 19, 2019 at 1:42 pm

    I have had seen issues with even and accurate heating with “kitchen” hot plates. I use mainly Precision Water baths for most applications and use a digital, calibrated Hot Plate occasionally and they are affordable. The magnetic stirrers pretty quickly will become useless as the viscosity of the product increases. Two good quality (IKA) laboratory stirrers will do most of what you need at your bench. 

  • natzam44

    May 20, 2019 at 2:42 am

    Thanks all for the replies.

    I think I will try a cheap hotplate since I could afford to break it or dislike it.

    I can’t seem to find any digital hotplates for anything under $200USD which translates to over $260CAD without taxes (I would need to buy two of them as well).

    If I need to, then I will buy digital but for the meantime, I shall try my luck.

  • Gunther

    May 20, 2019 at 8:17 pm

    They work fine.
    Remember you never heat anything in the beaker directly. Always use a water bath.

    If you must warm something above water boiling point, or if you’re working with an anhydrous product, use oil instead of water to prevent water vapor from contaminating the formulation.

  • ngarayeva001

    May 20, 2019 at 8:46 pm

    @Gunther why you can’t heat directly in a beaker? I put thermometers and keep an eye on it.

  • OldPerry

    Professional Chemist / Formulator
    May 20, 2019 at 9:51 pm

    @ngarayeva001 - because you don’t get even heating. The part of the container that is in direct contact with the heating element can get hotter than boiling water. Using a water bath is a better, more controlled choice. 

  • ngarayeva001

    May 20, 2019 at 10:25 pm

    Good to know. Thank you Perry. 

  • David08848

    May 21, 2019 at 2:52 am

    Another option might be going to a restaurant supply place and checking out professional restaurant hotplates.  There are some really good options out there for these kinds of things.  I have a hotplate that I bought in one of those places that I have had for at least 10 years!  Find a nice, big store and take a trip in to see what they have.  You may find some other things there like stainless steel tables that you can use in your “lab”!  My workroom is full of things purchased at a restaurant supply place!