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Quick answers
When should I pick Open icon systems?
When the story is: slides, product UI, posters, school worksheets.
When should I avoid Open icon systems?
Skip it in cases like: mixing five icon styles on one slide.
Who invented or popularised it?
Feather to Lucide and other ISC/MIT SVG icon families on GitHub
What does it encode?
stroke or fill metaphors at a shared grid and weight
Is it OK in ads?
Yes if one claim is visible at a glance in Meta, Google and retail print; otherwise link to a full figure.
Will a teacher accept it?
Yes for lab reports and poster boards if axes, units and a source line are present.
Open icon systems encodes values as stroke or fill metaphors at a shared grid and weight. Feather to Lucide and other ISC/MIT SVG icon families on GitHub.
In reports, ads and assignments it fits slides, product UI, posters, school worksheets. Skip it when mixing five icon styles on one slide.
Principles
- Encoding — The core mark of Open icon systems is stroke or fill metaphors at a shared grid and weight.
- History — Feather to Lucide and other ISC/MIT SVG icon families on GitHub
- Fit — slides, product UI, posters, school worksheets
- Shared baseline — The eye compares length and position more accurately than area.
- Audience — PowerPoint, Excel or Google Sheets and Meta, Google and retail print share the same geometry.
Misconceptions
- Pretty equals true — Decoration rarely persuades; it slows reading.
- 3-D helps — Perspective distortion wrecks comparison. Keep it flat.
- More series is richer — Do not stack stories. One Open icon systems, one claim.
- Default palette is fine — Rainbow defaults fail color-blind viewers and grey print. Change Excel or Google Sheets defaults.
Why it matters
- Work — Work: slides, product UI, posters, school worksheets. Readable in four minutes in PowerPoint.
- Ads — Ads: one number and one shape speak first in Meta, Google and retail print.
- School — School: for lab reports and poster boards, pick the form that answers the rubric.
- Craft — Craft: honour stroke or fill metaphors at a shared grid and weight and decoration falls away.
Open icon systems: honour stroke or fill metaphors at a shared grid and weight, and switch when mixing five icon styles on one slide.