I really cannot believe that my last post was in 2023! Well, OK, 2024 was a bit of a write-off health-wise but I'm back, chomping at the bit and keen to remedy the lapse in soap stories. Which brings me on to Salt Soap Bars which in truth I've only really tinkered with over the last 15 years and I freely admit that I didn't fully understand the attraction of adding salt to soap which seemed to me quite a strange concept.
So let's get back to basics. Why would you add salt to soap? A number of reasons in fact. Firstly it can act as an exfoliant which can help remove dead skin cells and generally make your skin feel smoother and softer, secondly it stabilises the pH value, preventing the soap from becoming too alkaline or too acidic and finally, it makes a really hard, long lasting bar with a dense creamy lather. So there's three good reasons before we get to the feel, the look, the lather etc.
However, as a soapmaker, there are some other factors that make soap bars more challenging than ordinary bars. To begin with the salt will really affect the soap's ability to lather, therefore a high percentage of coconut oil is called for to remedy this. But... I hear you say, won't that have a very drying affect on the skin? Yes, it's true, too much coconut oil can affect the skin and this is where the science kicks in. To avoid this hurdle the soap formulation calls for 'superfatting'. This means reducing the sodium hydroxide (lye) content so that not all the oil is 'saponified' (saponification is the process that turns the mixture into soap). The heavy superfatting of a salt bar formulation results in a bar that is more moisturising and softer on the skin.
My first 'proper' Sea Salt Bars...Patchouli & Lime with Green Clay...
The salt combined with the clay gives the bars an almost pebble-like quality and being exceptionally hard, they come out of the moulds really well. Here are the same soaps intermingled with my second batch for which I used Himalayan pink salt and a pinch of paprika for colour.
Note: I fully expect (hope!) the paprika soaps to turn a lovely shade of pink whilst curing. If this happens I shall post a further photo.
Even though the bars harden up quickly they still require the 4 weeks curing time and I'm told that the lather develops beautifully with an even longer curing period so I'm planning on leaving these for a couple of months...that's of course if I can wait!!