Both Polypropylene and PTFE are commonly used plastics due to their unique properties. Polypropylene is cost-effective, versatile, and chemically resistant, making it popular in various industries such as packaging, textiles, and automotive production. Its melting point falls within the range of 130-171C and its recyclability add to its widespread use in consumer goods. Meanwhile, Teflon is best known for its non-stick qualities up to temperatures of 260C.

Its exceptional heat resistance and chemical inertness make it a go-to material for cookware coatings, aerospace components, and industrial applications. However, the manufacturing process for Teflon is typically more complex and costly compared to polypropylene. Ultimately, the decision between these two materials will depend on specific needs such as temperature exposure, mechanical stress, and budget constraints.

The cost of yarn varies widely based on its materials, brand, and where it's purchased. Acrylic and cotton yarns are generally more affordable, while luxury fibers like cashmere and merino wool can be expensive. The price can also depend on the yarn’s weight, with heavier, bulkier yarns often costing more per skein. Additionally, hand-dyed or artisanal yarns come with a higher price tag due to their unique colors and the labor involved. For budget-conscious crafters, acrylic and other synthetic yarns can be a cost-effective choice, offering a wide range of colors and textures at a lower price point. However, those looking for natural fibers or specific properties (like hypoallergenic or durability) might find these qualities in more expensive yarns. Ultimately, whether yarn is considered "expensive" largely depends on the individual’s budget and the project requirements.

In Ark: Survival Evolved, dyeing animals isn't directly possible as you dye items or structures. However, you can apply colors to your animals by using the Paintbrush or the Spray Painter tool. First, craft dyes by combining berries, water, and charcoal (or sparkpowder for lighter shades) in a Cooking Pot or Industrial Cooker. Each dye requires specific ingredients for different colors. Once you have your dye, equip a Paintbrush or Spray Painter, load it with the dye, and then use it on the animal you wish to color. Note that this process applies the dye in specific regions of the animal, allowing for detailed customization depending on the creature's model. Remember, painting animals is purely cosmetic and does not affect gameplay aside from the aesthetic pleasure it provides.