Comments by "Gaza is not Amalek" (@Ass_of_Amalek) on "Making Eyeglasses From Coffee Grounds In Ukraine | World Wide Waste | Business Insider" video.

  1. I'm not buying the claim that what they're using is some plant oil mixture that magically works like epoxy resin. as a violin maker, I'm quite familiar with natural resins and oils usable for making varnishes and the like, and I'm not aware of anything like that, other than perhaps urushi sap that could possibly harden with moist coffee grounds, but I believe that would take weeks, not less than four days. urushi hardens with moisture, all other natural resin and oil options either polymerize with oxygen or dry by evaporation, or would need to be melted and mixed hot. what they're showing is relatively quick hardening of a cold mix with no air exposure or heating - only two-component resins like epoxy harden like that, and the sturdiness of the result certainly suggests a synthetic resin, too. coffee grounds are excellent for composting, they actually work great for adding nutrients to otherwise leaf- and wood-based garden, park, or plant farm compost, and worms love them. coffee grounds saturated with epoxy on the other hand are effectively particularly toxic microplastic. the subtractive CNC-cut process these people are using produces a lot of waste (much more waste than glasses frames), and whatever that alleged "plant oil mixture" is will certainly make the waste more environmentally problematic than the coffee grounds were to begin with, even if it was just magically epoxy-like natural oil and resin. in short, the environmentalist branding here is truly absurd, it's absolute hipster BS.
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  2. my dad is a gardener, and he treats coffee grounds as a treat for the compost worms. he's certainly convinced that it's one of the best things to compost. I think coffee grounds probably contain a good amount of nutrients other than nitrogen (like phosphorous and potassium) that are otherwise lacking in purely plant-based compost, since coffee grounds are made from fruit, and producing fruit is what plants tend to particularly need phosphorous and potassium for. coffee grounds also have the upaide that they're an extremely clean substance to compost to produce compost usable for growing food, ssince the coffee grounds themselves are very food-safe and most likely particularly free of pesticides compares to other parts of many plants (since the coffee beans come from the inside of coffee cherries, so there's little chance of pesticides coating the beans).
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