She had gone through the book with black ink and a pen.

Each line is marked with either red or green ink.

For over 50 years I have been doing my writing with pen and ink.

The first lines of each chapter are written with red ink.

Most important was a heavy line, drawn with black ink.

At times, it seems as if the history of women is written with invisible ink.

Light can interact with the paper and ink in more complex ways.

And that day my pen was filled with green ink.

I, too, remember writing notes to my best friend with invisible ink to pass in class.

They seem so still and foolish directly they're written down on white paper with black ink.