Paper waste in offset printing industries contributes not only to economic inefficiencies but also to environmental degradation through increased CO₂ emissions. This study explores the integration of Lean Carbon Mapping (LCM) with traditional Lean tools to optimize paper usage and reduce the carbon footprint associated with printing operations. A case-based research design is applied across selected offset printing units in Tamil Nadu, India. The methodology involves Value Stream Mapping (VSM), identification of high carbon-emitting activities, and targeted interventions using Lean practices such as 5S, Kaizen, and Standard Working procedures. The implementation of Lean Carbon Mapping resulted in a 45% reduction in paper waste and a 45% decrease in estimated carbon emissions linked to material handling and print defects. The findings demonstrate the potential of LCM as a strategic tool for advancing both operational efficiency and environmental sustainability in the printing sector.