When I was teaching I used to say the teacher learned the most. I learned something when I got this comment after a post. “I thought it might be useful to add here that paper also has a grain (I think of it as a warp/weft) and will curl and fold parallel with its ‘warp’ more smoothly. So, folding the sides of the warping paper, if it is held sideways, will crinkle the paper.” I use short pieces of packing paper and I wonder if this person uses continuous packing paper. I’ve not noticed any problems when I have folded my papers for years, but it’s only because I never ran into paper that had such strong grain.
Preparing the Packing Paper
The principle is this: cut the paper 4” wider than your warp is intended to be and about 2” longer than the circumference of the loom’s warp beam. For longer warps, you will need several sheets prepared—say, about one for every yard of warp length. The edges should be folded so they are double strength at the edges—these doubled areas will extend beyond the warp.
Use heavy paper such as a grocery bag. Cut off the bottom, cut off any handles, and cut along the seam so it lies flat. Fold each of the edges in 1”.
When winding in the packing paper, be careful that warp threads never travel over the paper folded double at the edges. The warp itself only goes over the single-thickness paper with the folded extensions sticking out to strengthen the paper at the edges. You may put in the paper with the folded part on top or underneath—either way of inserting the paper is all right. Make sure no warp falls on the doubled edges. Remember the comment I mentioned in the introduction. “…that paper also has a grain (I think of it as a warp/weft) and will curl and fold parallel with its ‘warp’ more smoothly.”
A Trick so the paper won’t wrinkle
Also watch for paper that is crinkling or rolling in at an angle. A simple trick prevents this: Insert the paper so that it can be wound with the warp, then turn the beam a bit until the end of the paper catches in. With your thumb and forefinger, take hold at the center of the opposite end of the paper, as in the photo, right in the middle. Hold it taut there as you wind the paper in with the warp so the paper can’t wrinkle.
When to put in the paper.
My teacher said about every yard. I usually put it in more often. I watch the edges of the warp building up. Just before the edge seems not to be sharp like a cliff or rolling in, is when I put in a new piece of paper. In Japan I noticed that they use small pieces of paper, too, but use them continuously.
I don’t recommend continuous packing paper because it is very difficult to get it wound on without wrinkling, and it builds up the warp beam circumference faster than short pieces put in every yard or so. Winding the warp tightly prevents the layers from biting down into one another so continuous packing paper isn’t necessary.