wash the corn, strain, and put into a pot
dissolve the slaked lime in water sufficient to cover the corn by a couple of inches
add the lime solution to the corn and bring to the boil
for best results simmer for just 15 minutes, then allow the corn to soak in the lime solution overnight
if you want to use the nixtamal on the same day, cook for 30-40 minutes, depending on the size of the corn kernels and leave to soak until the mixture has cooled to room temperature
The resultant kernels should be soft and wet on the outside but still retain their powdery, chalky centre
Transfer to a large bowl if necessary and placing this in your kitchen sink vigorously rub the kernels to loosen their skins. As the skins float to the top pour off some of the water and skins, topping up with fresh water and continuing the process as necessary
The more skin you can remove, the smoother the final masa or dough