Weigh the sodium hydroxide into a suitable container (plastic or stainless steel advised). Weigh the water into a suitable heat-resistant vessel such as a pyrex or plastic measuring jug, then add the sodium hydroxide to the water (never the other way round). This concentration of lye is close to the maximum the water can dissolve so care should be taken to ensure all the sodoim hydroxide has dissolved and that none has crystalised on the inner surface of the jug.
Set this lye solution aside for use in phase 4Phase 2:
Weigh all the phase 2 ingredients into a suitably large pan and heat while mixing until it reaches a temperature of 140 degF (60 degC)Phase 3:
When at 140 degF (60 degC) add the phase 3 ingredients and mix, slowly increasing the temperature to 165 degF (74 degC)Phase 4:
Once the temperature has reached 165 degF (74 degC) slowly add the lye solution (prepared and put aside in phase 1). Add it in a thin slow stream and mix constantly until fully combined, after which you may mix intermittently (every 2-3 minutes) for a total of around 20 minutes (the base should now look transparent).Phase 5:
Discontinue mixing and leave the mixture on the heat at a constant 165 degF (74 degC) for 1 hour. Do Not Overheat.Phase 6:
Gently stir in phase 6 ingredients until fully incorporated and cool slightly to around 150 degF (65 degC) before pouring into a suitable mould to cool and set.TIP:
to improve surface appearance and reduce surface bubbles after pouring spritz the surface with a mist of denatured alcohol immediately after pouring. If you can't obtain this a rubbing alcohol available from chemists will work.
Leave to fully cool.
Press out of the moulds and it's ready to use.
There! You've made melt and pour soap. Wasn't that easy!... Now all you need to do is re-melt, adding your favourite colours and fragrances.
To Make White melt & pour soap base simply re-melt, adding titanium dioxide (in suspension is the best version to avoid spotting).