The promoters were thinking for large capex as they said in latest concall that this capacity will be the highest in their history and what turnover they achieved since inception this capex will add more turnover than that. They must have waited for all visibility to think of this Capex. Meanwhile competitors like Camlin Fine, Clean Science will be there with their ready capex but the industry tailwinds will help accommodate multiple players imo.
The stock price may test patience of investors till the new capex gets functional.