Textiles was one of the key industries of the Industrial Revolution
and a chemist like Tennant, who learned his trade in the bleaching
industry, was well placed to exploit it. His patented bleaching
powder - which was probably devised by his partner. Charles
Macintosh - had the benefit of being portable, so could could
easily supply the burgeoning textile industry. In 1800 Tennant
and his partners moved to the St Rollox chemical works, the
largest in the world.