TOOTHPASTE
Waxed paper Cotton swabs Glass squares, 10 x 10 cm (4 x 4 in) Stirring rod Ruler Weight, 1 kg Hot plate ... Make toothpaste Recipe 1. Baking soda and salt: Measure 10 g (2 tsp) baking soda, and g (1/4 tsp) of sodium chloride into a plastic cup. Stir. ... Add 4 mL of glycerin to the baking soda/salt/calcium carbonate/sodium lauryl sulfate ...