Thomas Bell patented a printing technique in 1783 that used copper rollers. In 1785, Livesey, Hargreaves and Company put the first machine that used this technique into operation in Walton-le-Dale, Lancashire. The production volume for printed cloth in Lancashire in 1750 was estimated at 50,000 pieces of ; in 1850, it was 20,000,000 pieces. The commercial method of calico printing using engraved rollers was invented in 1821 in New Mills, Derbyshire, in the United Kingdom. John Potts of Potts, Oliver and Potts used a copper-engraved master to produce rollers to transfer the inks. After 1888, block printing was only used for short-run specialized jobs. After 1880, profits from printing fell due to overcapacity and the firms started to form combines. In the first, three Scottish firms formed the United Turkey Red Co. Ltd in 1897, and the second, in 1899, was the much larger Calico Printers' Association 46 printing concerns and 13 merchants combined, representing 85% of the British printing capacity. Some of this capacity was removed and in 1901 Calico had 48% of the printing trade. In 1916, they and the other printers formed and joined a trade association, which then set minimum prices for each 'price section' of the industry.