Boning! The hardcore part of corsetry! Boning, historically, has been quite a creative area, and people were always looking for materials that would be both sturdy and light enough for everyday wear. Reeds and whalebone were favourites where 18th century stays were concerned, but neither of these were either feasible (or legal) for my particular needs. I’ve heard it suggested in several sources that cable ties (zip ties, tamper proof ties) can work in a pinch, and it seemed poetic to finish a cardboard corset with boning that came from a hardware store rather than a haberdashery. I bought them in bulk: 100+ ties of 30cm/14 inches each.
The corset on which my project is based was a fully boned corset, meaning that the entire corset was boned, not just the seams as is the case with more modern corsets. But since I had been using the corrugated cardboard exactly for the purpose of creating structure I thought it would only be necessary to bone the tabs as that was the area on the waist that would take the most strain.

Boning at the tabs. Tabs also received extra stitching between the edging to create more bone channels.

Close-up of boning at tabs as well as extra stitching.
However….in the end I decided to bone the whole thing, having bought the ties in bulk in all that. It appears it must have been pre-meditated after all, because when I did the horizontal stitching I made sure that they corresponded to the ridges in the cardboard (marked with black on the cardboard in previous pictures) effectively creating bone channels that I may or may not later choose to use.

Fully boned.
The overlap in boning at the back and in some places around the waist was mostly intentional to provide extra strength to areas that would likely to take more strain.

Close-up of bones and bone channels
Tags: 18th century corset, bone channels, boning, cable ties, cardboard, corset, corset pattern, corset tabs, stays