The site was originally occupied by Mold Cotton Mill which was built around 1792 and operated until 8 November 1866 when it was destroyed by a fire, writes David Rowe of Mold Civic Society.

The newspaper of the time was the Flintshire Observer which reported that the fire had resulted in a loss of some £20-25,000 and upwards of 200 jobs.

The original owners of the mill were local bankers, Samuel and James Knight, and, in 1819, they purchased the adjacent Rhual Estate for £24,500.

They subsequently went bankrupt and the estate was purchased on 14 May 1832 by Field Marshal Sir Alured Clarke and returned to the original owners of the estate and whose descendents remain there to this day.

The original company of Mold Tinplate Works was established in 1873 by Rowland Morgan, William Williams and John Hughes from South Wales but closed after running into financial difficulties in 1876.

Subsequently, the Alyn Tin Plate works was founded in 1878-9 by Morgan Morgans (1833-1891) and his brother-in-law David Williams), whose family home was Mold's former stately Bromfield Hall, and in 1936 it was acquired by Richard Thomas & Co (South Wales) until in 1944 the Government requisitioned the factory as a ordnance depot.

Following the Second World War the site was bought by chemical company Synthite Limited in 1947 which remains on the site to this day.