Manufacturing or not

I intend to start a mix and match centre for offset printing units in Delhi.

I will buy ready made inks in 5 to 20 kgs cans. Then mix the same by hand to match the shade required by the printing unit and fill in 1 kg and 2 kg cans. Then sell.

Question 1: Will this amount to manufacturing?

Question 2: The turnover will be less than Rs 1.50 crores, do I need to register or inform any authority, other than sales tax department.

Thanks

Anil Bhargava