Working with multiple colours in the weft has been a lot of fun, but it does require some thought on how you will carry your “inactive” colour up the selvedge. Well, at least if you’re weaving a complete product, like a scarf, where hairy or loopy selvedges aren’t a good thing.
The important thing is to make sure the “active” colour – the one you’re about to put into the shed – wraps around the “inactive” colour. That way it will be pinned to the selvedge and not flop about!
This does get a little trickier when you’re carrying a colour up a few picks of weft, but it’s usually easy to see what you need to do.
Another consideration with two + colours is which side of the web to start them on. If you have the colours come in from opposite sides of the shed initially (and it’s an unvarying alternation of colours) then they kind of leapfrog each other.
And if this is all as clear as mud, I’d recommend doing a small sample, because it’s pretty simple when you see it in action!
When carrying yarn up the selvedge, the key is to be consistent, so you get a nice, neat pattern of colour at the edge.
Something to keep in mind with alternating weft colours/textures is that, if the cloth you’re weaving is for cutting and sewing, then you don’t need to carry them; you can actually just cut the colour off with a tail at the selvedge and re-introduce it on the next pick where it’s needed. Though, I suspect this might waste more yarn than carrying…not sure.