Production
Pastilles are made by pouring a thick liquid into a powdered, sugared, or waxed mold and then allowing the liquid to set and dry. The substances contained in the dried liquid are slowly released when chewed and allowed to dissolve in the mouth. The substances are then absorbed by the mucous membranes of the oral cavity or in the lower gastro-intestinal tracts. Various substances, be they of medicinal nature or for flavour can be put into pastille forms.
Due to the oily nature of these active substances (essential oils, tinctures and extracts), pastilles are usually based on a mixtures of starch and gum arabic, which emulsifies the substance and binds them in a hydrocolloidal matrix. The starch and gum also reduces the rate in which the pastille dissolves and moderates the amount of active substances delivered at a time. Gum arabic also hardens the pastilles and makes them more sturdy in storage and transport.
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