In recent years, the printing and dyeing sector has been negatively affected by Chinese government's intensified environmental regulation so end-users were burdened with hiking printing and dyeing cost. On the other hand, dope-dyed chemical fibre with its low cost and eco-friendly property has grown rapidly. Dope-dyed virgin PSF, for example, has developed and gained around 15 per cent total capacity of virgin PSF in 2016. And among the non-conventional varieties, the black one takes the lion’s share for around 60-70 per cent. Compared to conventional virgin PSF, this variety has shown good cost advantage. Black virgin PSF basically trended likewise with semi-dull virgin PSF in 2016. However, the price spread between the two sustained high at around 1500-2300yuan/mt. At the same time, black rose 1500yuan/mt or 18 per cent, showing this variety has a better anti-risk ability compared with the cost-sensitive conventional PSF which hiked around 2000yuan/mt or 33 per cent. 　 The fundamental reason for the development of doped dyed virgin PSF is its low cost and eco-friendly properties. Compared to 6000yuan/mt cost of printing and dyeing for conventional spun yarn and grey fabrics, downstream plants will save around 4000yuan/mt using black virgin PSF as the feedstock. Not to mention that their production is free from political influence such as environmental regulation. Thus nowadays, the whole industrial chain from chemical fiber plants, spinners to fabrics plants, all are devoted to proclaiming the dope-dyed product to cater for the idea of environmental protection.