The move takes the company, which is located in Trafford Park, to a total of 140 staff.
It will now also add new embroidery and vinyl printing machines to its offering as well as upgrading current direct-to-garment printing equipment.
Managing director Sam Jones said: “The extra capacity and staff numbers enable us to keep pace with the rapid increase in demand we are experiencing.
“It took a decade for the business to produce one million logos, and now we are printing or embroidering over a million designs each year.
“We’re seeing especially strong growth for workwear, in sectors such as hospitality, construction and leisure. Demand for embroidery on caps is also buoyant.
“We are continually investing in the latest equipment to ensure we remain at the forefront of the industry in terms of speed, flexibility, quality and colour vibrancy.”
With clients in over 35 countries the company prints and embroiders logos and designs onto t-shirts, polo shirts, hoodies, sweatshirts, caps and more.
Clients range from small firms and charities to household names such as Google, Coca-Cola, Mercedes-Benz, Microsoft and Kellogg’s.
The figure takes the firm’s total investment over the past four years to £1.5m.
The fastest-growing part of Quayside Group, Clothes2order is on track to achieve record turnover of more than £12m for 2017, up from £10.7m last year.