- Cut a strip of thin or medium cardboard and stick some double sided tape on one or both sides of it, front and back. The cardboard should be a few inches long.
- Get your yarn, and stick the end to the sticky tape on the back of the cardboard.
- Now wrap the yarn around the card, making sure not to stretch it or allow it to bunch up - careful on the tension. Make sure the strands are sitting right next to (but not overlapping) each other. The sticky tape will help to hold it all in place.
- Continue for OVER an inch, at least 2 inches preferably, depending on the yarn(s) you're measuring. When it's long enough secure the other end of the yarn to the sticky stuff.
- Now, get a ruler and place it so that you're measuring 1 inch in the middle of your wrapping. Use the middle to try and get an average.
- The number of strands of yarn that fit into that inch is your number of wraps per inch, or wpi. So, if, as for my Sirdar Clik wrapping, I counted 12 strands in that inch, I know the yarn has a wpi of 12.
I now know that my finished yarn must also be 12 wpi for it to be of the same thickness as Sirdar Clik.
^ measuring the wpi on my wrapping
Anyway, from hereon in I need to get experimenting with my own fibre, trying to get the right thickness, ply and texture to my yarn. It's all down to trial and error, and I'll tell you all about it when I've actually got round to it ;)