Hair dye filler, in the context of coloring hair, is a product used before applying hair dye to create an even base color and help the dye adhere properly, particularly on damaged or porous hair. It essentially fills in the gaps and inconsistencies in the hair shaft.
Here's a breakdown based on the available reference:
- Purpose: When hair is bleached or lightened, it can become porous. This means it has uneven texture and gaps in the hair shaft. Filler aims to correct this.
- How it Works: Filler adds missing pigment back into the hair.
- When to Use: Before applying your desired hair color.
