What does gloss mean in hair?

In hair care, gloss has a specific meaning that refers to a semi-permanent treatment that adds shine, enhances color, conditions, and smooths the hair cuticle without the commitment or damage of permanent dye. A hair gloss, also called a hair glaze or toner, is typically a demi-permanent or semi-permanent formula that coats the hair shaft with a thin layer of color and shine agents. There are two main types. Clear gloss contains no pigment and is used purely to add intense shine, smooth frizz, seal the cuticle, and make hair look healthier and more reflective. It is popular after coloring or for dull hair. Tinted or colored gloss contains a small amount of pigment to refresh faded hair color, neutralize brassiness in blonde or brunette hair, enhance natural tones, or add warmth or coolness. Unlike permanent color, gloss does not lift or lighten hair with ammonia, it deposits tone and fades gradually over 3 to 6 weeks with washing. Salons offer professional glossing treatments, and there are at-home gloss kits. The result is shinier, softer, more vibrant hair with less damage than permanent dye.