I sewed French seams for the inner and outer side seams so there are no raw fabric edges and hopefully the seams will be reasonably robust. To make the seams, I sewed 7mm from edge (wrong sides together) then trimmed the seam allowance to about pressed it open then folded right sides together and pressed again so the seam lies along the fold. I sewed again 7mm from the edge. The seams were then pressed to one side (all pressed towards the back of the trousers). The seams 7mm were wide because I had a total seam allowance of and I could line up the edge with the edge of my sewing machine foot.
Although Klein had worked with blue extensively in his earlier career, it was not until 1958 that he used it as the central component of a piece (the color effectively becoming the art). Klein embarked on a series of monochromatic works using IKB as the central theme. These included performance art where Klein painted models' naked bodies and had them walk, roll and sprawl upon blank canvases as well as more conventional single-color canvases.  Six sculptures by Klein in the Musiktheater im Revier , Gelsenkirchen, Germany, are executed in IKB.