
Figure 1
Stroke characteristics of a porous-tipped Prismacolor Premier® Brush|Fine Art Marker brush tip: a) blunt initial stroke; b) blunt terminal stroke; c) ink feathering; d) heavy ink deposit with pausing.
Table 1
Porous-tipped writing instrument products included (or not) in market survey.
| Included | Not included |
| Brush pens and markers | Paint markers |
| Permanent markers | Brush pens that require dipping |
| Metallic markers | Gel highlighters |
| Metallic brush markers | Deco markers |
| Glitter markers | Colorless blending markers |
| Pens | Water markers and brushes |
| Markers | Pens in a set containing artistic materials |
| Highlighters | Markers designed specifically to write on: cars, outdoor objects, |
| Erasable highlighters | tape, ceramics, glass, currency, skin, overhead projectors, and |
| Dual tipped pens, markers, and highlighters | white boards |
| Fineliners | |
| Calligraphy markers and pens | |
| Technical pens | |
| Washable markers and pens | |
| Stamp markers | |
| Some industrial markers |

Figure 2
From right to left, Spectrum noirTM Colouring System Marker chisel tip, Prismacolor® Premier Brush|Fine Marker brush tip, Arteza® EverblendTM Art Marker fine tip, Tanmit Dual Tip Brush Pen fine point tip, and amazonbasics Felt Tip Marker pen fine point tip (20x zoom).

Figure 3
A comparison of writing characteristics from artistic porous-tipped pens, left column, and non-artistic porous-tipped pens, right column.

Figure 4
Example of artistic porous-tipped pens used to create blended ink effects.
