The permanence of fabric dye depends on the type of dye, fabric, and the dyeing process used. Some dyes, like reactive dyes for cotton or acid dyes for wool and nylon, form a chemical bond with the fabric, making them more resistant to washing out. Others, such as some direct dyes or all-purpose dyes, may fade gradually over time with repeated washing, especially when not used according to instructions or without a fixative. Using the correct dye for the fabric type, following the dyeing instructions carefully, and treating the dyed fabric according to care recommendations can significantly enhance the longevity of the color. Pre-washing fabrics to remove any finishes and using a dye fixative can also help in ensuring the dye sets well. However, even with all precautions, some fading over time with repeated washing is normal and should be expected.

Brushes with polyethylene bristles are found in various applications where soft, flexible, and chemical-resistant properties are desired. Polyethylene, a versatile polymer, is chosen for brushes used in light cleaning tasks, food service applications for its compliance with food safety standards, and sometimes in industrial settings for gentle surface treatment. These brushes include bottle brushes, scrub brushes, and certain types of brooms. Polyethylene bristles are appreciated for their durability in wet conditions and resistance to a wide range of chemicals, making them suitable for environments where hygiene and low abrasion are critical.

Pigments in makeup serve as vital components that impart color and vibrancy to cosmetic products. They are finely ground particles of various substances, both organic and inorganic, designed to adhere to skin, nails, or hair. Makeup pigments can be classified into three main types: natural (derived from minerals like iron oxides), synthetic organic (produced through chemical synthesis), and synthetic inorganic pigments (like titanium dioxide). These pigments not only determine the shade and intensity of makeup but also influence its overall performance. For instance, they affect how well a product covers imperfections, its longevity on the skin, and even its ability to resist fading under different lighting conditions. In recent years, there has been a growing trend toward using natural and mineral-based pigments due to their perceived benefits, such as being less likely to cause allergic reactions or irritations. When choosing makeup products, considering the type of pigments used can help consumers find options that align with their skin type and health preferences.