The backs of foldable chairs at moment have one support bracket along the back which doesn’t provide a great deal of support for the back. The crucial area where there is no support is the lumbar region of the back so I have mocked up a very simple added sheet of plastic which provides greater support for the back. It is aimed at allowing the back to come into contact with the chair over a greater surface area distributing pressure over the back rather than one point as with the seats at the moment. I will be using this back rest again to gauge the angle that works best. A back rest that is perpendicular with the base would not work for this chair, so by possibly using some sort of adjustable strap to adjust the angle of the back support I will be able to find the correct position.
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