When did IGR begin with the UV watermarks on assays?

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When did IGR begin with the UV watermarks on assays?

Postby thecrazyone » Tue Jan 03, 2023 8:08 am

Over the weekend, I learned that a black light will display UV watermarks, so I pulled out my bars to give this a try. I could easily see the markings on 2 of the newer assays (the ones that are the blue/white split). The solid blue ones that I have do not have the markings, but, I also believe it was prior to the implementation of those marks. Anyone know when they began being applied? I'm guessing 2021?
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