Positron Computing
Positron Computing was run by Derek Jones and based in Llanelli and released a hi resolution screen dump QL Graphic Screen Dump developed by Lotus-Soft (which appears to have been Derek's software development name), which worked with Epson or compatible printers.
Version 2 of the software included a windowing ability, allowing you to define the area to be printed and also where it would appear on the printed page.
A version of the screen dump was also used in the ArtICE drawing package.
Lotus-Soft also released a range of Sinclair ZX Spectrum games