The present invention relates to black alcohol soluble dye formulations of high color intensity, low viscosity, and high tinctorial strength. The formulations are particularly useful for writing instruments such as felt tip and roller ball pens.
                            本发明涉及颜色强度高、粘度低、
锡切强度高的黑
色醇溶性
染料配方。这些配方尤其适用于书写工具,如毡尖笔和圆珠笔。