I chose this pattern because it used the direction of the boning to create the shape and I could best utilise the ridges of the cardboard with such a pattern (the ridges of the corrugated cardboard creating boning of sorts). This pattern uses only six panels, but I cut the panels according to the direction of the boning, thus creating 12 panels: 6 to a side.
I used this pattern in conjunction with a very nifty corset pattern generator by Drea Leed to make sure that it will eventually fit me.

"Solidly whaleboned lining of bodice, the outside of which is covered with cream satin beautifully embroidered with a floral design in coloured silks and gold and silver; the outside has only two side seams. Probably the bodice of a court dress, as from about this date the day robes were worn back on the soulders again. This bodice is very similar in shape to the stays worn by the effigy of the Duchess of Richmond in Westminster Abbey, 1701 - 1702 (c.1680)"
First, I cut the panels out of the cardboard (that I found outside an art shop in Finchley Road) making sure the corrugations coincide with the direction of the boning on the pattern. For some reason that I do not now recall I decided to make the tabs square instead of rounded, however, the biggest change I made was to make it an open-fronted corset. The bodice in the pattern closes completely at the back, but since I would be dressing myself I needed something that laced in the front. I also wanted to make a stomacher to go underneath the lacing (not sure that is at all historical) and therefore decided to not add extra inches to accommodate my 21st century waist. I also removed the shoulder straps, thinking that making comfortable straps out of cardboard was maybe a bit too optimistic. However, removing the straps made it difficult for me to guess the top line of the corset, as can be seen by the lines drawn in the picture below: I wasn’t sure if I had made enough allowance for the arms.

The panels laid out as they would fit together. Marked "L" 1-6 and "R" 1-6. As you can see by the lines drawn at the top I was already beginning to doubt the line, wondering if I should make more allowance for the arms.
Corsets should be able to take quite a bit of strain, even stays and boned bodices like these that weren’t really designed to cinch the waist but to create a neat cylindrical body shape, so the biggest problem in working with cardboard was that it might tear. To counter this I decided to overlap the panels by an inch and a half and sew over the entire overlap to strengthen the seams and spread out the pressure somewhat. Also, should some tearing occur, the overlap ensured that it would still remain more or less intact.

Overlapping panels at the center front.
Next I added triplex board to the center front and center back panels for extra strength where the lacing would be. The cardboard was too pliable and would not have stood under the hard wear of the laces. A hole punch served to make the eyelets.

Center Front

Center Back
Tags: 18th century corset, cardboard, corset, corset pattern, stays