EarthTones: Chemical Sensing Powders to Detect and Display Environmental Hazards through Color ...
summary
Wearable pigment powders detect CO, UV and ozone and change color using a palladium complex for CO (visible darkening at ~60 ppm within ~20 minutes), a two-layer system with a UV acid generator and pH dye for accumulated UV (measured absorbance rise between 550–650 nm after 1–4 hours), and a potassium iodide + starch reaction for ozone (opacity and purple tint after ~24 hours). Technical tests confirm visible transitions and an exploratory study with 18 participants finds people can distinguish changes by eye but skin-safety and tone personalization remain unresolved.
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chapters (11)
- 0:00Introduction to EarthTones
- 1:52Exploring cosmetic powders as sensors
- 4:04Detecting carbon monoxide hazards
- 6:33Sensing UV radiation levels
- 8:40Monitoring ozone exposure
- 10:07User study and feedback
- 12:20Future work and skin safety
- 13:00Conclusion and acknowledgments
- 13:21Q&A on chemistry and computing
- 14:31Q&A on social and performative aspects
- 15:58Q&A on visibility and skin tones