I'm fairly new to warp-faced weaving but have been doing a lot lately. I have done a lot of brocade, supplementary weft or what ever you want to call it so I thought I'd combine the two.
Not so easy, the weft-faced cloth is so dense that most any extra heft from the supplemental warp distorts the web, even just passing through from the face to the back.
First I tried a supplemental weft that goes in the shed then floats on the surface. This makes a raised area and you can see the color of the weft even when it is in the shed.
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Next I tried just floats and turns on the surface, and that did work well. With and without tie downs. I find this technique only makes bold blocks of color. Limiting.
So maybe I should do away with the ground weft and just put two colors in each pick, technically weft substitution not brocade but I'm just looking for something that works here.
First I tried two stands of embroidery floss ( if you think emb. floss has 6 stands, then this is 12) at the bottom. This does NOT cover the ground. Nor do the 4 strands up higher. Then I tried some hot pink acrylic knittting worsted and olive sock yarn. The acrylic works well! Esthetically acrylic is a hard pill to swallow so I tried some hand-dyed alpaca/merino knitting worsted. Not quite as good but maybe acceptable.
What have you found that works for brocading these densly woven warp-faced webs?