The partners were initially Herbert James Aynsley, John Gerrard Aynsley and William Illingworth. Herbert was the eldest son of John, who founded the well-known firm of John Aynsley & Sons. He had gained much experience in the manufacture of good quality china, having been in business with his father for many years. John Aynsley retired in July 1900.

In 1907 Herbert Aynsley's youngest daughter married Hugh Irving, who was a sales representative for the Rubian Art Pottery Ltd in Longton. Irving subsequently joined his father-in-law as a partner in the Star China Company when Illingworth retired in 1910.

Such was the popularity of Paragon China that in 1919 the company decided to change its name and in 1920 became The Paragon China Company. Hugh Irving, who had been in active control of the business for many years, became sole proprietor in September 1927, when the partnership was dissolved and Herbert Aynsley retired. In 1930, the Company became known as Paragon China Limited.

Irving was a very astute businessman making the best of every opportunity afforded him. He introduced modern methods of publicity such as window display competitions for retailers and he organised events attended by celebrities of the day. These attracted much publicity in the national press, further encouraging shops to stock Paragon products.

Hugh Irving and his sons, Leslie and Guy, who had joined the business in 1928 and 1933, respectively, continued their association with the firm until it was taken over by Thomas C. Wild & Sons Ltd, manufacturers of Royal Albert bone china, in 1960. In July 1964, Wild and its subsidiary companies, including Paragon, merged with the Lawley Group Ltd which later that year changed its name to Allied English Potteries Ltd.

Paragon became part of Royal Doulton in 1972 and continued to produce china under that name until 1991. By 1989 the name and patterns had been absorbed into Royal Albert and by 1992 the Paragon name was discontinued. Some later Paragon patterns from this period continued in production under Royal Albert and were still available until the Royal Albert name was discontinued by Doulton.

The Queen (Mary) and other members of the Royal Family were attracted by the Paragon designs and regularly ordered it for use in their own households or as gifts for others. In April 1933 Paragon was honoured by being granted a Warrant of Appointment to Her Majesty The Queen (Mary). Royal Warrants may be granted to people or to companies who regularly supply goods or services to a particular member of the Royal family. Strict regulations govern the warrant, which allows the grantee or his company to use the legend 'By Appointment' and display the relevant Royal Coat of Arms on products.

Towards the end of the 20's Paragon had started labelling some of their better quality china 'Royal' Paragon. The granting of the Royal Warrant prompted the company to introduce the new 'coat of arms' backstamp(trademark) and to describe all their products as Royal Paragon china. Unfortunately, in so doing, Paragon fell foul of the authorities as Warrants of Appointment do not carry the right to use the word 'Royal' and the prefix was withdrawn. Current evidence suggests that 'Royal' Paragon was no longer produced after the end of 1934.

In 1938 the company was similarly honoured by the new Queen, now Queen Elizabeth, The Queen Mother, and in turn, her daughter, Her Majesty The Queen granted a Warrant of Appointment in 1955. A list of the Royal Warrants of Appointment granted is shown below. These may be followed in the Paragon backstamps from 1933 onwards. Interestingly, Royal Warrants of Appointment granted by both HM Queen Elizabeth II and HM Queen Elizabeth, The Queen Mother to Royal Albert Limited for the manufacture of Paragon Fine Bone China are still in existence.