What hair condition is characterized by its resistance to color?

The hair condition characterized by its resistance to color is low porosity. Hair with low porosity has tightly packed cuticles, which creates a barrier that makes it difficult for moisture and color to penetrate. This means that when applying hair color or chemical treatments, low porosity hair often requires more effort or specific techniques to ensure that the color effectively deposits and develops within the hair shaft. The dense nature of low porosity hair also means it tends to repel moisture and chemical products, necessitating heat or additional processing time to achieve the desired results. Understanding the porosity of hair is crucial for selecting appropriate products and techniques for coloring or treating hair, enabling better outcomes in the application process.