A Welsh plant is one of two in the UK that will be producing face masks as part of a £14m Government investment in manufacturing millions of coverings each week.
The Chancellor of the Duchy of Lancaster Michael Gove said on Monday that suppliers in Port Talbot and Blackburn in north-west England, had started producing "high quality" face coverings, with another site in Livingston, Scotland, to begin in the coming weeks.
It is part of a Government drive to increase production of face coverings in the UK, he added.
The first production lines are being established at the British Rototherm Group, in Port Talbot, Cookson & Clegg, in Blackburn, and Transcal, in Livingston.
The PA news agency understands that the 20 production lines bought by the Government are phase one while a second phase is expected to start producing in late August, with Government investment in both phases totalling £14 million.