Lithol Red is one of the commonest 20th century red synthetic organic pigments. It is used in various printing industry for its brightness and bleed-resistance. Performance of pigments depends on their size completely. In the current research, microemulsion as simple and novel method has been applied for the preparation of Lithol red nanopigment. The optimized microemulsion formulation contains water 15%, n-butyl acetate 55%, cethyl trimetyl ammonium bromide (CTAB, as cationic surfactant) 15% and 2-propanol (as co-surfactant) 15%. Lithol red nanopigments are characterized by SEM and TEM. Prepared Lithol red nanopigments were spherical with the average diameter of 60 nm and low size distribution.

立索尔红是20世纪最常见的红色合成有机颜料之一。由于其亮度和耐渗色性，它被用于各种印刷行业。颜料的性能完全取决于其尺寸。在当前的研究中，微乳液作为一种简单而新颖的方法已经被用于制备Lithol红纳米颜料。优化的微乳液配方包含15％的水，55％的乙酸正丁酯，15％的乙基偏苯甲基溴化铵（CTAB，作为阳离子表面活性剂）和15％的2-丙醇（作为辅助表面活性剂）。SEM和TEM表征了Lithol红色纳米颜料。制备的Lithol红色纳米颜料呈球形，平均直径为60 nm，尺寸分布较小。