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Historically, some food and cosmetic products derived their red coloring from carmine or cochineal extract, substances made from the crushed bodies of the female Dactylopius coccus, a type of beetle. This method of obtaining red pigment has been used for centuries due to its effectiveness and vibrancy of color. However, in recent years, there has been a shift in the industry, particularly with companies like Mars, Incorporated, which produces Skittles. Due to consumer demand for more vegan-friendly and ethical products, Mars announced a move away from using animal-based ingredients, including carmine, for coloring their candies. Now, Skittles and many other products use alternative sources for red pigment, such as lycopene from tomatoes or beet juice, to maintain their vivid colors while aligning with modern ethical and dietary preferences. This change is part of a broader industry trend towards transparency, sustainability, and respect for consumer values.
Schedule 20 PVC pipe, known for its thin walls compared to Schedule 40, is commonly used in low-pressure water applications and drainage. Finding Schedule 20 PVC might be slightly more challenging than its thicker counterpart, but it's still readily available. Major home improvement stores such as Home Depot and Lowe's usually stock a variety of PVC pipes, including Schedule 20, especially in regions where its use is prevalent. For more specialized needs or sizes, plumbing supply stores or online retailers like Amazon or SupplyHouse.com can be excellent sources. These outlets provide a wide range of options in terms of diameters and lengths, catering to both professional plumbers and DIY enthusiasts. Additionally, buying from online platforms can offer the convenience of home delivery, although shipping for long pipes can be costly. Always check the specifications carefully to ensure you are getting the right Schedule 20 PVC pipe for your project.
Isotactic polypropylene (iPP) is a type of polypropylene where all methyl groups are oriented on the same side of the polymer chain. This configuration grants iPP a semi-crystalline structure, resulting in unique physical properties. One of the key characteristics of iPP is its high crystallinity, which significantly contributes to its strength, stiffness, and resistance to impact at temperatures above its glass transition point. Additionally, iPP exhibits excellent chemical resistance, making it impervious to most common acids, bases, and solvents. Its melting point is around 160°C to 170°C, higher than that of atactic polypropylene, due to its orderly molecular structure. However, it has low transparency due to its semi-crystalline nature. In applications, iPP is favored for products requiring high strength, durability, and chemical resistance, such as automotive parts, textiles, reusable containers, and plastic components in various industries.
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