Cold Porcelain is available as a commercially made mix you can buy - but you can also make a similar clay yourself from three simple ingredients. This clay is fun to use, dries super hard and can make solid chunky pieces or wafer thin translucent pieces. You can colour it with paints or paint on it when dry - add glitters, sand, etc and it sticks easily onto wood or glass to decorate items. Varnish to make fully waterproof.

So, let's make cold porcelain -

Recipe

The recipe will be different depending mainly on the brand of glue you use – for this one I used Elmer’s Glue-All – a white pva glue.

Ingredients

2 cups Glue
½ cup water
3 cups cornstarch
2 tablespoons baby oil

Tools

Plastic microwavable bowl
Strong wooden spoon or flat stick
Cup and Tbs measures
Spatula or blunt knife

Note, you don’t need to sieve the cornstarch and you don’t need to mix until it’s really even – just break up any big lumps.
Pop it in the microwave -

NOTE – all microwave ovens are different – some cook super fast, some very slow.

Your cooking times will also depend also on the size of your bowl in relation to the amount of clay you are making – big bowl, little clay, it may take longer, big bowl, lots of clay may be slow at first then cook really fast once it gets hot.

So, err on the slow side at first – I do 1 min @ 10% or the lowest setting first – if it is barely warm I move to 1 min @ 30%.
Each time you finish a microwave session, take the bowl out and stir the clay – as it cooks the edges with harden first so it’s important to scrape them and stir them in.
You don’t need to make a smooth paste, just break up lumps and pull in the edges to into the mix.

When the mix starts to get significantly thicker, harder to scrape off and stir, shorten your microwave times to 45s
It should take about 4-5 minutes in all to get to the point where the mix sticks to the spoon/stick. As it gets thick enough to hold it’s own shape but will still stick to your finger when you touch it, shorten your times to 30s





When it's ready it will hold fairly well together when you mix it in the bowl and it will not stick to your fingers anymore when you press your fingers in.
BUT it's okay to take it out when it's still a little sticky and knead in more cornstarch: In general, it's better to UNDERcook a little than to overcook.
Now you are ready to take it out of the bowl and knead it.

Sprinkle a generous layer of cornstarch on your table and over your hands.
Turn out your lump of clay, scrape the sides and bottom of the bowl as best you can, then sprinkle some cornstarch in the bowl and scrape some more – the rest will come off more easily as the cornstarch dries it.
Don’t worry if some is left back – let it dry and then it will peel off very easily – this is my recommended clean up method.

If you choose to wash out your bowl, make sure you allow a lot of water to flow so the gluey mix does not clog your drains.

But, don’t clean up now – you need to pay attention to finishing your clay – so, cover your hands in lots of cornstarch and knead your dough.

Caution – your clay may be very hot – so check first before you plunge your hands in. But start kneading as soon as it reaches a temperature you can handle – if you leave it too long, a crust will start to form.

Dust your hands - no, smother them in cornstarch - and start to knead.

You’ll find it easily kneads into smooth consistency dough. Pull it apart to get the insides to the outside and make sure the whole dough get mixed in during kneading.
Look out for when it starts to have ‘cracks’ that don’t stick together – it’s ready at that point or when it forms a nice roundish lump of clay that doesn’t stick to you or the table.

Put it in a plastic bag and tie it.
NOTE: always keep clay you are not using in plastic sealed off from the air – this clay dries quickly and when it half dries, it is difficult to form good shapes from it, so keep it wrapped up.

Colouring The Clay

You can easily colour this clay using any water based paint - acrylic, poster, watercolour, food colouring will all work. Some oil paints will also work but they may cause it to dry very slowly or may not mix in and will exude oil so be careful and try it out on a small bit first.

NOTE: Opaque paints will make your clay more opaque, translucent paints will help keep it see-through if you want to make decorations that the light will shine through.
Whatever paint you choose, take a lump of clay, make a small well in the middle by pushing down on the clay with your fingers. Squeeze a little paint into the well and then wrap the edges of the clay over the well.
Don’t worry if paint sneaks out – as long as it doesn’t spurt out all over you, just keep pulling the clay and wrapping it over itself in any random way and the colour will mix in.
Just keep an eye out for the clay getting too wet from the paint – if so, pick up any cornstarch or drier bits of clay left on the table with the clay or if necessary, sprinkle more cornstarch onto the clay.

You’ll find it can get quite wet without becoming sticky if it is made well. And at the other end of the spectrum, don’t mix it until it starts to dry out either! You can add in more paint i.f you want a stronger colour
You can choose to mix until it’s a uniform colour or stop when it is still marbled with natural and your colour. You can marble two or three colours together also – just roll out two coils and twist them around each other, then fold and twist and roll, fold, twist and roll over and over until you get to a marble pattern you like.

When you’re done colouring, and marbling, pop the clay in a plastic bag and tie it off.

Let us know if you try this out - and if you have any questions - just pop it all in the comments box - love to hear from you.

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