When some people find out my preference for spreading the warp to it's weaving width is rough sleying there can be a variety of reactions.
One is, why do I 'waste' time sleying the reed twice? If I'm sleying the reed anyway, why don't I just cut the loops and dress the loom front to back? If I prefer back to front warping, why don't I just use a raddle?
The answers to those questions take longer to explain than a short answer, which is, this is the method I have tweaked to fit my needs and it works best for me.
How I got to that conclusion takes much more detail.
The warp above is an example of how spreading the warp using a reed is most definitely rough.
I'm aiming for 24 epi, but I have - mostly - wound two ends at a time., Except for where I haven't. This means that in order to rough sley there is a bit of mixing and matching going on.
I don't have a six dent reed wide enough, which would be the easiest size reed to use. I have two six dent reeds - one of which is too narrow, the other which is way too wide. So I tried a 12 dent reed, which is also 'long' and the spaces are narrow.
So then I picked up the 8 dent reed. I am sleying \4\4\4\0\4\4\4\0 for the most part. Except for when the stripes begin and end and I wound 2 ends of a colour to outline the stripe. So where the stripe begins and ends, I am putting 6 ends in the dent.
When I used the 12 dent reed, I put those 2 ends in their own dent, but then the warp was spread wider than the weaving width of 25" and my warp packing was perilously close to being too narrow. Using the 8 dent reed, I'm putting those two ends into the same dent as the background colour to make the warp narrower than the weaving width.
Now this is not my preference, but for this textile having the warp beamed narrow is not going to cause any particular issues as it has enough elasticity to take the deflection from narrow to wide to narrow (as it draws in during the weaving).
When I demonstrate this technique people get very concerned about how 'messy' the threads can look. So long as I have tied a good tight choke tie, any disruption in the threads isn't going to matter much as long as I don't yank on the ends and pull slack up out of the length of the chain.
So why don't I just use a raddle? Well, when I started winding and beaming warps on the Fanny I did borrow a raddle. But I found that filling the raddle really wasn't much of a time saver - the objection some have to rough sleying a reed - that it will take longer than filling a raddle. The real reason I gave up on a raddle though was that the sections were too large for the usual yarns that I use. I wanted a finer separation of the yarns so there would be less tendency for them to wrap around each other.
In the end, after trying both - and I tried the raddle several times - I find this method more efficient even though I may take a little bit more time at this stage which will save me a lot more time at the beaming stage. Of course my default length is 11 meters.
Or at least...this has been my experience.
But there are many ways to accomplish all of the stages of weaving - from winding the warp in the first place, spreading the warp for weaving, beaming, threading (or the other way round if you prefer front to back), tying on.
It depends on your goals which processes will work 'best'. It depends on your personal preferences, your equipment, yarn, environment.
As they say...Your Mileage May Vary.
Currently reading The Nothing That Is; a natural history of Zero by Robert Kaplan