Hello! I am currently looking into building a small hydrostatic pressure chamber to test the behaviour of a piece of tissue (cartilage) under physiological pressures. The pressure range should be between 5-15 MPa. I need to measure the volume change/deformation of the tissue, so the chamber would need to be transparent. Ideally I would like to be able to videofilm the process, from a side view. I have an Instron compression machine that I can use to move a piston. However, I am bit uncertain about the design. What transparent material can withstand such high pressures? Any help or direction to sources of information would be greatly appreciated!