印第安墨水是什么墨水？

钻时切割前划线员用来标注切割轨迹的专用墨水。
和普通墨水的相比他性能更稳定，是一种天然的色剂。

Basic India ink is composed of a variety of fine soot known as lampblack, combined with water to form a liquid. A binding agent such as gelatin or, more commonly, shellac may also be added, to make the ink more durable once dried. India ink is occasionally sold not as a liquid, but in solid form (most commonly, a stick), which must be moistened before use.

印第安墨水是印第安人发明的墨水

。。。。。。。。。。。。。。没听说