Peel the apples. Dissolve the hydrated lime in 2l of water using a spatula, and soak the apples in the limewater for 3 hrs, stirring gently every 10 mins. Remove the apples and wash with water. Mix the sugar with 2l of water and bring to a boil. Add the apples and simmer for 2 hrs. Leave to cool in their syrup. To concentrate the apples, remove them from the syrup and place them in the oven with dry heat at 130°C for 45 mins. Finish the drying process at 60°C until they have the desired appearance