Sans Text & Regular, hinting: hyphen thicker than other horizontal strokes

[ortoslon]

In some sizes above 15 ppem Sans Text's hyphen (the ASCII one -) is noticeably thicker than the em-dash and horizontal strokes of e, z, H. Mono Text doesn't have this problem.

Side by side in Chrome 109 on Win10:
https://github.com/IBM/plex/blob/003b8b0a6f56acd78e8fa78ddf471f71412e18b4/IBM-Plex-Mono/fonts/complete/ttf/IBMPlexMono-Text.ttf and https://github.com/IBM/plex/blob/003b8b0a6f56acd78e8fa78ddf471f71412e18b4/IBM-Plex-Sans/fonts/complete/ttf/IBMPlexSans-Text.ttf

[ortoslon]

Same with https://github.com/IBM/plex/blob/003b8b0a6f56acd78e8fa78ddf471f71412e18b4/IBM-Plex-Sans/fonts/complete/ttf/IBMPlexSans-Regular.ttf

[BoldMonday]

If you check the actual outlines of those glyphs then you will see that hyphen is always thicker than most other dashes. That is by design. Because of its short length, a hyphen needs to be heavy enough to be clearly recognisable.

The difference in weight between hyphen and dashes can sometimes disappear in small sizes because of rounding to whole pixels. We don't see any issue with that.

[ortoslon]

Thanks for the explanation. I was just surprised in comparison with other well-hinted monolinear fonts: