In addition, the particle size distribution of the carbon black pigment in the ink is more uniform. And the pens filled with such gel ink behave good writing performance.

此外墨水中颜料炭黑颗粒粒度分布也较为均匀，墨水灌制成笔后划线书写线条饱满。

youdao

Note: The Application must be filled out in black or blue-black ink with neat writing.

注：本申请表应用黑色或蓝黑色钢笔、签字笔填写，字迹应清楚。

youdao

Patterson pencils in ruled lines on the sheets to guide his writing and erases them when he is done, leaving black ink on creamy white pages.

WSJ: Unlikely NY scribe handwrites Good Book in 4 years