What was the emphasis on in the artistic language of 'Group 1890'?

Rough texture and surface as a new artistic language

Answer: Rough texture and surface as a new artistic language
Group 1890 wrote about the importance of rough texture and surface in their works as a new artistic language.

Since the time of the Bombay Progressive Artist’s Group, artists began to write their own manifestos or writings, in which they declared the main aims of their art and how it differed from others. In 1963, another group was formed under the leadership of J. Swaminathan, named Group 1890. Swaminathan also wrote a manifesto for the group, in which the artists claimed being free from any ideology. Rather than a set programme, they adopted a fresh look at the material used in painting, and wrote about the importance of rough texture and surface in their works as a new artistic language. It included artists, such as Gulam Mohammed Sheikh, Jyoti Bhatt, Ambadas, Jeram Patel, and sculptors like Raghav Kaneria and Himmat Shah. It was a short lived movement but left an impact on the next generation of artists, especially, those associated with the Cholamandalam School near Madras.