Air Dry Baking Soda Clay

Since clay suppliers are not transparent with what additives they use to prevent cracking or drying time, we don’t feel comfortable using the current air dry sculpting clays on the market. This baking soda clay has been our replacement while we continue to search for another solution. It’s a soft clay and dries slowly, but you can build up detail in layers once the one below is dried. It is also easy to sand, sticks well to balsa wood, and you can dip your finger in water to blend it into whatever material you apply it to. As an added bonus, we added methyl cellulose powder so that methyl cellulose glue more easily adheres to it, which makes it easy to mend cracks and breaks as well as glue other materials to it!

Materials Needed

  • 1 cup of baking soda
  • 1/2 cup of cornstarch
  • 3/4 cup of water
  • 1/4 cup methyl cellulose powder

 

  • Stainless Steel sauce pan
  • Silicone spatula
  • Bowl with damp towel
  • Compostable cling wrap or bag (for storage)

Directions

  1. Combine ingredients in a stainless steel sauce pan on the stove top.
  2. Turn on heat to medium-low.
  3. Stir constantly until the mixture starts to thicken and stick to the spatula.
  4. Continue to stir until it reaches a clay-like consistency. (It will start to form a ball.)
  5. Turn off heat and remove clay from pot.
  6. Have a plate or bowl with a damp towel at the ready. Put the clay onto the towel and fold the sides up so the clay begins to cool inside the damp towel.

Notes

  • Best if used immediately.
  • To store, place remaining clay into a compostable bag or cling wrap and keep in the fridge.
  • The clay will begin to form a dry crust on the outside. With each use, moisten with filtered water and mold it in your hands to get it back to its original consistency.
  • If you have leftover clay, break it up into pieces and compost it.

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