An ink is provided. The ink includes a quinacridone pigment and an organic solvent having a solubility parameter of from 9.00 to 11.80 in an amount of from 30% to 60% by mass of total mass of the ink. Both a viscosity change rate and a particle diameter change rate of the ink, before and after the ink is heated at 80° C. for 4 weeks in a sealed state, are in the range of from −5% to 1%.
提供了一种油墨。该油墨包括一种
喹吖啶酮颜料和一种溶解度参数为 9.00 至 11.80 的有机溶剂,其用量占油墨总质量的 30% 至 60%。油墨在密封状态下于 80° C 加热 4 周之前和之后的粘度变化率和颗粒直径变化率均在 -5% 至 1% 的范围内。