ArtMetal

Warren,

Charles and I have been discussing this.
It seems that his definition of fold forming has to do with folding and then unfolding and perhaps refolding to obtain pattern remnants from the unfolded bends as part or all of the pattern, as such this piece probably escapes his definition as the folds were made in the places they were wanted and then never reworked (other than making them crisper/sharper)

Raising is not the major operation in the formation of this shape however. Raising involves pushing the material into itself by making ruffles or tucks and then pounding them back into the sheet, or by working it over a stake so that raised area being struck is driven down and into itself and the surrounding supporting area. The process of raising involves a change in surface area and an increase in thickness, (and sometimes a relocation of that volume to an adjacent area)

My thesis is that the shape is developed by folding or bending, like making an angle bracket, or a box, or a fluted coffee filter.
The entire bowl is one complex set of tucks, one complex set of ruffles, that if you pounded down into a uniform "cone" would give you a raised bowl, but if you step on it and squash it flat, will unfold back to a flat plate with a fold formed pattern on it. (Charles definition of fold formed) instead of a bowl.
That is the reason I did the sample bowl with a similar pattern. I folded the material along the pattern lines to create the shape. That there is further work in Karls bowl, in the textured flutes and the domed up (probably faceted by planishing with a flat hammer over a round stake) areas near the outer edge is obvious, but the making of a flat sheet into a similar bowl can happen without raising. Even turning the outer edge out and down can be done by adjusting the widths in the fold pattern.