Do you have a sweater that you no longer wear, but love the yarn it was made from? If so, consider recycling that sweater! Send me your sweater, I'll carefully unravel it, wind it, wash the yarn, and return it to you so that you can knit or crochet it into something new!
The best kinds of sweaters to unravel are ones made from natural fibers (wool, cashmere, angora, alpaca, etc.) and not synthetic ones (acrylic, nylon, etc.). It should be easy to see the individual stitches (when wool felts, it becomes difficult to see the individual stitches and impossible to take apart), and not have a large number of "pills" forming on it. The seams should be crocheted or knitted together, and not serged. The picture shows a vertical column of small "V"s stacked on top of each other just inside the seam. This is a crocheted seam, and is the most common way sweaters are seamed together. (Serged seams are made when a piece of knit fabric is cut and then sewn together. Because the fabric was cut, each row of the sweater is one piece of yarn, and unraveling it results in hundreds of pieces of yarn - not ideal for knitting/crocheting!)
If you have questions about unraveling a sweater you have, please contact me and send some pictures of your sweater. I'm happy to take a look and let you know if I think it can be unraveled. Also, I'm happy to wind your yarn into center pull balls if you'd like - just send me a message to let me know.