What are the two types of drying?

The two types of drying are often described as natural drying and mechanical drying, though other classifications exist depending on context. Natural drying relies on ambient air and sunlight to remove moisture, such as line drying clothes outdoors, sun drying food like fruits and herbs, or air drying dishes. This method uses no additional energy but depends on weather, takes longer, and requires space. Mechanical drying uses equipment to accelerate moisture removal, such as tumble dryers for laundry, dehumidifiers, or industrial dryers for food and materials. In food science, two types are often described as direct drying where hot air contacts the product and indirect drying where heat is transferred through a surface. In laundry, you might also hear of evaporation drying where heat evaporates water and condensation drying where moisture is condensed. The core distinction is whether drying occurs passively through environmental conditions or actively through engineered heat and airflow, with mechanical methods offering faster, more controlled results at the cost of energy use and potential wear on materials.