> For the complete documentation index, see [llms.txt](https://docs.sevenpens.com/drawtab/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.sevenpens.com/drawtab/core/pressure/pen-pressure-range.md).

# Pen pressure range

## Overview

Based on my analysis of pen pressure ranges, I have developed this simple rating scale for IAF and max pressure. This represents my initial thinking and I expect to revise this in the future based on feedback.

For more general information about pen pressure, see [Pen pressure](/drawtab/core/pressure.md).

A wide pressure range is very desirable. It contributes a lot to a good pressure experience. A wider pressure range is even more important than the number of pressure levels.

## Landscape

Consider this diagram to be a DRAFT. It will evolve as I learn more.

I think the pressure categories here (EXCELLENT, VERY GOOD, etc) are reasonable.

But be aware that, for a specific pen, there can be significant differences in IAF and max pressure between individual units.

<figure><img src="/files/8fTLylIYoNxLUPjUkSNo" alt=""><figcaption></figcaption></figure>

## Pressure data and sources

* Manufacturers
* From tablet experts such as Kuuube
* And my own measurements: <https://1drv.ms/x/s!Aml8i4Jd6crCkTerfXD_1zsIxg3A?e=2aCPfI>

## **Considerations**

* Pens, even of the same model, vary in their pressure handling.
* Drivers can potentially affect IAF.

## Resources

* Comments on pen pressure levels and ranges for Wacom products: <https://www.reddit.com/r/wacom/comments/10l0ujb/comment/j5u1v3z/?utm_source=share&utm_medium=web2x&context=3>
* Comparison of minimal gram-force ("initial activation force"/"initial activation pressure") recognized by various digital pens and digitizers ( <https://www.reddit.com/r/stylus/comments/opc44f/comparison_of_minimal_gramforce_initial/>)
* Initial Activation Force / Initial Activation Pressure Cintiq Pro 16 2021? (<https://www.reddit.com/r/wacom/comments/v9989o/initial_activation_force_initial_activation/>)


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