#technical process
- To sour — To subject a material, food, or substance to a controlled souring or acid fermentation process; to become sour. In certain old crafts or technical contexts (such as tanning or textile preparation), the action refers to the structural chemical treatment of fibers or hides in weak acid solution baths to modify their physical properties of elasticity and resistance.
- Flavoring — The act of flavoring or scenting and its result; the technological or culinary process of adding aromas, essences, or essential oils to a product to impart a pleasant scent or flavor.