![](https://coimages.sciencemuseumgroup.org.uk/132/2/large_thumbnail_2015_0015__0010_.jpg)
Sample perspex window used in researching high pressure windows
![Sample perspex window used by Ian Gilchrist in researching high](https://coimages.sciencemuseumgroup.org.uk/429/902/small_thumbnail_smg00173283.jpg)
![Sample perspex window used by Ian Gilchrist in researching high](https://coimages.sciencemuseumgroup.org.uk/3/390/small_thumbnail_2007_0143__0002_.jpg)
![Sample perspex window used by Ian Gilchrist in researching high](https://coimages.sciencemuseumgroup.org.uk/3/389/small_thumbnail_2007_0143__0001_.jpg)
Sample perspex window used by Ian Gilchrist in researching high pressure windows for Benthic pressure trap. Window with a strain grid inscribed on a diametral plane. This window was pressurised once to 290 MPa in a lubricated mount.