C1592 is a high-grade CMC specifically used in stationery inks, with a replacement rate over 0.9. It boasts a viscosity between 1500-1600, high transparency, and excellent fluidity, easily passing a 250-mesh sieve. Due to its high and even replacement rate, the inks produced maintain long-term stability and do not lose viscosity, making it a benchmark for the new generation of stationery ink products.