"“Non-toxic resin” in my opinion is a marketing term. Many plastics could conceivably be described as non-toxic. This Fast Company article indicates Karst paper is HDPE, same as the predecessors:https://www.fastcompany.com/90406976/this-company-wants-to-disrupt-the-90b-paper-industry-with-books-made-of-stone"

"The article intro stating “Karst has figured out how to make paper from stone” is inaccurate, stone paper has been around for about a decade: https://www.wired.com/2013/02/stone-paper-notebook/"

"While it bears some similarities to the photo clamp, it’s not right to say that was the inspiration—- this same hinged clamp design has been the standard for bike work stands, both shop-grade and cheapo knockoff, for decades. "

"While the mechanism is good, it has not been invented here; this exact style of table was a form in American furniture dating back 300 years. Search “tri-leaf table” or “Tri-drop pivot table”. "