*they invite me to play...you simply can't NOT experiment and play with them! I mean...it's impossible! Nor can you plan things out...it's very intuitive...the colors I use, where I place them etc.
* totally compatible with all other media from oil pastels to collage to chalk paints etc.
* works with multi tasking...I can apply some inks and let them dry for an hour or two while I attend to something else and when I come back...ready for the next layer.
*not terribly expensive...and a little goes a long way.
*I can layer white tissue paper over the inks to mute the colors and designs but they still show through...creating really interesting textures and color variations.