Hot air and material sprayed at fast speed (increases surface area massively) and high temperature instantly dry the material.  Starting Material: liquids, solutions, slurries, or emulsions. Final material: powder Use when: - Heat Sensitivity is High: Because evaporation happens so fast (seconds), the actual product temperature stays low due to evaporative cooling. This is ideal for milk, enzymes, and vitamins. - Specific Particle Shape: It produces uniform, spherical, hollow particles which are great for "instant" solubility (e.g., instant coffee). - Encapsulation: Used to "trap" oils or flavors inside a powder matrix. Common Applications: Powdered milk, detergents, pharmaceuticals, and pigments.