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How to make Roma Plastilina modeling clay

Roma Plastilina is an oil-based modelling clay, similar to Plasticine, manufactured by the Spainsdh company, JOVI. Because it is easy to work oil-based clays into fine details, it is commonly used to help create moulds. However, most people would know oil-based clays because of their use in stop-animation -- also known as "claymation" -- films and advertisements. This is because the oil content allows the clay to remain permanently malleable. While the quality of shop-bought oil-based clays is reliable, they are sometimes cost-prohibitive. If you are up for experimentation, you can use a simple recipe to create your very own version of the fine Roma Plastilina clay found in art supply shops.

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  1. Put the wax in a deep pot and heat until the temperature on the thermometer reaches 121 degrees C (250 degrees F).

  2. Add the petroleum jelly and baby oil.

  3. Add the powdered clay slowly and reduce the temperature until the thermometer reads 82.2 degrees C (180 degrees F).

  4. Turn heat to low and stir every couple of hours for 6 or more hours.

  5. Remove clay from the heat at 32.2 degrees C (90 degrees F).

  6. Knead clay until smooth and store in an airtight container.

  7. Tip

    This recipe will yield a batch of clay about the size of a golf ball; simply double the recipe to increase the yield.

    Warning

    Do not try to make this clay in a crock pot.

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Things You'll Need

  • 60 g (2 oz) Old Mine #4 ball clay
  • 18 g (2/3 oz) cheese wax (clear)
  • 12 g (0.4 oz) petroleum jelly
  • 7 g (1/4 oz) baby oil
  • Confectionery thermometer
  • Deep cooking pot, such as a turkey fryer
  • Ohaus triple beam gram scale

About the Author

Rachael Muldrow has been writing professionally since 2010. She writes about planning for weddings and parties, sewing crafts, and issues in natural childbirth and parenting. Rachael received her Master of Arts in secondary education language arts in 2003 from the University of Alabama in Tuscaloosa.

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