The Types segment classifies Tissue Marking Dyes by chemical functionality and intended use. Vital dyes (e.g., methylene blue, toluidine blue) are applied to living tissue, enabling real‑time visualization without compromising cellular viability, a requirement for intra‑operative mapping and live‑cell imaging. Non‑vital dyes (e.g., crystal violet, eosin) are reserved for fixed specimens, providing permanent contrast for histological evaluation. Fluorescent dyes (e.g., fluorescein, rhodamine) emit light at specific wavelengths, supporting multiplexed imaging and digital pathology platforms that demand high signal‑to‑noise ratios. Within each category, sub‑types are differentiated by solubility, staining intensity, and spectral properties, which dictate suitability for distinct workflows. The diversification of dye types expands the market’s addressable base, allowing laboratories to select formulations aligned with procedural constraints and regulatory considerations, thereby reinforcing the overall market taxonomy.