👉 The DVD fluid, or DVD-RW (Rewritable) dye layer, is a critical component of DVDs that enables data storage and retrieval. This fluid consists of tiny, microscopic particles of dye molecules embedded in a polymer matrix, which is coated onto the DVD's surface. When a laser reads or writes data, it interacts with these dye particles, causing changes in their physical state that represent binary data (0s and 1s). The dye layer is sensitive to heat, allowing the laser to either evaporate or alter the dye's chemical structure, thereby encoding information. This reversible process allows DVDs to be written and rewritten multiple times, making them versatile for various applications such as data storage, video recording, and optical data transfer.