The zipper is a wedge, which is a simple machine that works by putting two inclined planes side by side so that they create a sharp edge. A zipper has two lower wedges that permit it to close and a single upper wedge that allows it to open.
Wedges are used to separate things, either by cutting them or pushing them apart. They also function to hold things in place. Other examples of wedges are an ax, a knife, a fork and a door stop.
The inclined plane decreases the force needed to to raise an object to a certain height. This decrease in force makes it easier to perform work.Learn More
Wrinkles can be removed from leather by hanging the leather in a bathroom in which the hot water is running to allow the wrinkles to fall out, or using an iron. Care should be taken when using a hot iron to avoid burning the leather.Full Answer >
A caftan pattern is used for creating a long, flowing garment called a caftan or kaftan, without having to buy the garment from a retail clothing store. Caftans patterns are typically for sewing cloth, opposed to using heavy yarn, because light-weight caftans are designed to be worn in hot weather.Full Answer >
Synthetic leather, also known as faux leather, vinyl or leatherette, is a manmade fabric made using PVC or polyurethane (PU) that is treated and dyed to resemble real leather. Synthetic leather is a cheaper, a more versatile and an ethically friendly alternative to real leather, which is made from tanned animal hides.Full Answer >
Braid leather by cutting slits into a piece of leather to make three connected parts and weaving the parts together. This takes only a few minutes and requires an 8-ounce piece of leather, a matte knife and a straightedge.Full Answer >