Yes, you can make a scarf from yarn. Only yarn. It does, however, depend on the yarn. Working more or less from my latest felting book, there was a tutorial on how to make a scarf using only a mohair yarn blend. I have seen this procedure in other books. To make it work, you need a high percentage of wool in the yarn. Mohair comes from goats, or kid (the babies). It is rather fluffy. It is these long fibers that can grab onto other wool yarns. Also, the yarns cannot be superwash. Superwash yarn has a coating that makes it easy to wash in the machine. Superwash yarn will not felt. There is also superwash roving that you can buy for spinning. It is the same thing and will not felt.
In the old days (pretty much the 80’s), mohair used to be very fluffy and would shed a lot and had the potential to be itchy. Nowadays, most mohair is made from kid and is usually blended with another fiber, such as silk or polyester. However, the other fiber is usually about 20%. It is also not as hairy as it used to be and comes in a variety of beautiful colors. I have acquired some lovely mohair blend yarns to use in some of the scarves I made from an online course. The yarn itself is very thin and fine. I used some bright colors to make a scarf with yarn.
Here is the layout. I used a mohair polyester blend that was multicolored in bright colors. It was my last bit of this yarn and I managed to get about 2 passes. I then used a 100% merino thick/thin yarn from Uruguay. I had two colorways of this – a pink one and one with a bit more blue. I love this yarn. It is so soft. I will probably buy some more and knit something with it. I managed to make two passes with each colorway. I then used a bright pink mohair/silk blend to seal it all in. Such a lovely pink, all gone now! I made it the length of the table which is just over 6 feet long. The width is about 12 inches. I then wet it out with soapy water and gave it a good sanding. I only sanded on one side and then left it overnight. I have found that with the thicker yarns, leaving it alone allows them to soak up the water better and easier to get the yarns to stick together.
The next day I sanded the other side and rolled it about 50-60 times at each end. I then hand rubbed it several times. In the end, I had a bit of shrinkage on the width, though not the length. I was ok with that.
Here it is drying on the mannequin. I put it in the washing machine on the spin cycle to get most of the water out. The machine does a really great job.
Here you can see both sides. One side is very pink and the other side is quite mixed. You can wrap this scarf around your neck a couple of times. It is very soft and light.
Here is a close-up. It is almost like a cobweb scarf. This may be my new summer scarf!