Working quickly, pour the green liquid soap base into the circle, triangle and square sections of the mosaic tile silicone mould.
Ensure the soap base covers the entire three sections of the mould by spreading it around with a rubber scraper and spraying alcohol to break the surface tension and remove any bubbles.
Set the soap aside to set for 30 minutes.
Once the soap is set, turn the mould over and push out the mosaic soap tiles onto the paper-lined tray while bending and flexing the mould.
Clean the mould if necessary and repeat the process to make red mosaic soap tiles.
Sort the soap tiles by shape into separate containers.
Melt your soap base as per the instructions in a microwave or double boiler (for this part of the process a double boiler is recommended).
Scent your soap with fragrance oils or essential oils (optional).
Spray the surface of your mosaic soap designs with alcohol to help the soap layers adhere to each other.
With your melted soap base in one hand, and your spray bottle of alcohol in the other, gently pour the liquid soap base around the mosaic soap tiles to ‘grout’ them into place.
As you pour, spray the soap with alcohol to help it fill the small gaps between the mosaic soap tiles, and to remove any bubbles.
Clean up any white soap spilled on top of the coloured mosaic soap tiles immediately with a cotton bud dipped in alcohol.
Once all four soap bars have been ‘grouted’ pour any remaining white soap base into a small paper cup (2oz) to be used again later (optional).
Allow the soap bars to set for three days and then demould them by pushing from the bottom as you peel back the silicone mould.