Kynsilakan

Kynsilakan is the Finnish term for nail polish, a cosmetic product used to color fingernails and toenails. It is typically applied as a thin film that dries to a colored, glossy layer on the nail plate. In addition to color, many formulas provide a protective or decorative function and can help reduce chipping when paired with proper base and top coats. The term is widely used in Finland and in Finnish-language contexts.

Traditional kynsilakan is usually a nitrocellulose-based lacquer dissolved in organic solvents. Its composition often includes pigments for color, plasticizers for flexibility, resins or binders, thickening agents, and additives that affect drying and gloss. A base coat is commonly used to improve adhesion and protect the natural nail, while a top coat adds shine and helps seal the color. Gel polishes are a related form that cure under ultraviolet or LED light, enabling longer wear and a different removal process.

Application generally involves shaping and cleaning the nails, applying a base coat, applying two coats of color with drying time between layers, and finishing with a top coat. Proper removal is important to maintain nail health and usually involves acetone or non-acetone nail polish removers. Gel or shellac-like formulations require professional removal or specific at‑home routines to prevent damage.

Safety and regulation vary by formulation. Some chemicals historically used in nail polish—such as certain solvents or additives—have raised health or environmental concerns, leading many manufacturers to market 3-free or 5-free options that omit specific chemicals. Ventilation during use and proper disposal of empty containers are recommended. Advances in formulations continue to address durability, odor, and safety while preserving a wide range of colors and finishes.