iso15008__stem_width

Check if 0.10 <= (stem width / ascender) <= 0.82

iso15008/stem_width

• Applies to: TTF
• Fontspector can hotfix?: no
• Fontspector can fix sources?: no

Rationale

According to ISO 15008, fonts used for in-car displays should not be too light or too bold.

To ensure legibility of this font on in-car information systems, it is recommended that the ratio of stem width to ascender height is between 0.10 and 0.20.

(Note that passing this check does not guarantee compliance with ISO-15008.)

Proposal

• https://github.com/fonttools/fontbakery/issues/1832 and https://github.com/fonttools/fontbakery/issues/3251

Profiles

• iso15008 (in section 'Iso15008 Fonts Checks')