#photochromic
Live, measured metrics for the hashtag #photochromic from the open social web. Every number carries a named source and the time it was fetched. Nothing is estimated.
Own #photochromic
This #name is available to claim. It becomes your portal on the open agent web: this very page, a keyword you rank for by an open public stake, and a verifiable identity for AI agents. Nobody else sells a page like this for every #name.
Day-by-day usage
measured · mastodon.social (Mastodon public tags API) · fetched 2026-10-22 17:08 UTC0 uses by 0 unique accounts across the window. Real per-day counts, not estimates. Newest bar is today so far.
Related hashtags
measured · mastodon.social (Mastodon public search API) · fetched 2026-10-22 17:08 UTCLive pulse
measured · mastodon.social (Mastodon tag timeline) · fetched 2026-10-22 17:08 UTCEverything below is measured over the latest 3 public posts (spanning ~72554 hours).
Posting hours (UTC)
Languages: English (2)
Avg boosts / post: 0
Top of the latest posts
Programmable pigments: Photochromic nanoparticle inks for rewritable tattoos https://www.cell.com/matter-light/fulltext/S3117-5848(26)00119-5 Comments: https://news.ycombinator.com/item?id=50041252 #HackerNews #programmablepigments #photoch
This Unique Flip-Flop Uses Chemistry and Lasers https://hackaday.com/2024/01/24/this-unique-flip-flop-uses-chemistry-and-lasers/ #chemistryhacks #photochromic #merocyanine #LaserHacks #spiropyran #flip-flop #optics #laser #SR
Watch how to make photochromic figurines https://boingboing.net/2018/07/02/watch-how-to-make-photochromic.html #photosensitivematerial #photochromic #chemistry #Science #family #Video #video #Post #Kids
What “photochromic” means
Wiktionary · WikipediaPhotochromism is the reversible change of color upon exposure to light. It is a transformation of a chemical species (photoswitch) between two forms through the absorption of electromagnetic radiation (photoisomerization), where each form has a different absorption spectrum. This reversible structural or geometric change in photochromic molecules affects their electronic configuration, molecular strain energy, and other properties.
“Photochromism” on Wikipedia (CC BY-SA) →#photochromic across platforms
every network with a public tag surfaceFollow #photochromic straight to each platform’s own tag page. Where a platform publishes open data we measure it above; the rest lock their numbers behind paid APIs, so we link rather than guess.
Every number above is measured from a named public API at the shown fetch time. Nothing is estimated or extrapolated. Platforms that lock their data behind paid APIs are not shown. Agents: the same numbers, as JSON, at /api/hashtags/photochromic