Aided by the London Development Agency (LDA), the printer moved to new premises in Beckton from its previous site at Lea Mill, Hackney.
Park chief executive Heath Mason gave a presentation to Princess Anne before she was introduced to department managers and given a tour of the facility.
Alison Branch, managing director of Park Communications, said: "Following funding approval from the LDA, internal investment, and very detailed planning by the company, Park's relocation to Beckton has been extremely successful.
"The new printing facility, designed for maximum manufacturing efficiency, has allowed us to be right at the forefront of quality service provision, while accelerating our environmental programme to among the top six printers in the country.
"All this has lowered the unit cost of production, helped retain customers and attracted many new ones, enabling Park to maintain a strong financial position, despite the adverse market conditions."
Park Communications employs 109 staff and has a turnover of £11m. The company prints reports and accounts, fine art catalogues, and marketing and presentation literature.
Park Communications welcomes Royal visit to celebrate move out of Olympic Park
Park Communications welcomed HRH The Princess Royal during a visit to businesses that had relocated out of the London Olympic Park last week.