This recipe uses a fabulous British product - Cornish Kaolin Clay - and makes a ROCK hard bath bomb. Perfect for novelty bath bombs such as the massive Easter Egg shell pictured here.
Colourful & calorie free, this was made using a cracked effect chocolate egg mould (you can now buy one here) which we filled leaving a hollowed out centre. Doing so enabled us to "fill" the egg with 60mm bath bomb eggs. The two halves were then simply tied together with curling ribbon so that the inner contents could be seen.
Using the clay appears to speed up the drying time and in turn helped with moulding such a large form.
In combination with Witch Hazel, this is a fairly easy recipe to use for all situations and one that you could adapt to make any kind of bath bomb fizzer.
600g Sodium Bicarbonate
300g Citric Acid
50g Corn Flour
75g Kaolin Light BP Grade Clay
10ml Coconut Fragrance (any of your choice)
Acid Red water soluble powder colour
Witch Hazel spritz to bind
Combine all of the dry ingredients thoroughly in a plastic or glass bowl kept for the purpose.
Add the tip of a teaspoon of powder colour and mix well. The colour will not be apparent until you add moisture, so don't be tempted to add too much.
Add your fragrance whilst mixing constantly with (gloved) hands
Spritz 5 or 6 sprays at a time with Witch hazel, repeating 6 or 8 times or until the mix holds together when pressed in the palm of your hand. The correct consistency is the same as is needed when making successful sandcastles - damp but not over wet.
Press into the mould with fingers, spreading evenly and leaving a hollow in the middle of the mould.
Set aside to dry for 15 minutes before removing carefully and allowing to dry completely (1 hour)
You can of course use the mix in any mould and adapt the colour and fragrance to suit.