The Photographic Activity Test, widely known as the PAT, is an International Standard in itself: ISO 18916. The PAT explores the possibility of chemical interactions between photographs and a given material after prolonged contact. It uses two special detectors.
What happens after 10k followers on Instagram?
Once you have 10k followers, Instagram will make it easier for you to get people to your website via Stories with the swipe up to link feature. Swipe up is the only way to get a direct link from your Instagram to your other web properties. And, it’s available in STORIES, if you have 10k followers.