When ITO producers calculate their production cost, they typically count raw materials, energy, and labour. They rarely count what they throw away.

The conventional ITO production process — unchanged for decades — involves dissolving high-purity indium and tin in acid, precipitating an intermediate compound using ammonia, and calcining to produce the final oxide powder. It works. It produces ITO that meets commercial specifications. And it wastes a staggering amount of material at every step.

The material loss problem

Conventional ITO manufacturing loses 30–40% of indium and tin through the combined production and recycling cycle. This represents hundreds of thousands of dollars in lost material value per production line per year. In an industry where indium spot prices are volatile and supply is geographically concentrated, this loss rate is a structural competitive disadvantage that grows more damaging with every market disruption.

The recycling problem compounds it. Conventional producers recycle spent sputtering targets as a separate process from primary production — two independent material flows, two sets of process losses, two sets of energy inputs. The closed-loop integration that would recover material at source simply does not exist in conventional architectures.

The ammonia burden

Ammonia precipitation generates ammonium by-products requiring treatment and disposal. The process runs at elevated temperatures — increasing energy costs and CO₂. Ammonia handling creates occupational safety requirements, environmental reporting obligations, and regulatory exposure that producers have simply absorbed as unavoidable costs. They are not unavoidable. They are a consequence of process architecture, not chemistry.

What a circular process eliminates

M4GT’s closed-loop architecture integrates virgin and recycled material streams into a single production flow. Near-complete material recovery replaces 30–40% loss with near-zero waste. Operating without ammonia at lower temperatures cuts energy consumption and CO₂ by approximately 80%. These are not marginal improvements — they are a structural rethink of what ITO production costs need to be.