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Cake day: July 11th, 2023
  • DominusOfMegadeus@sh.itjust.workstoADHD memes@lemmy.dbzer0.com•What if need this exact thing? Where would I find it again if I carelessly threw it out now?English
    1·
    1 hour ago

    This Black Foam is what foam?

    You’re looking at something that’s dense, a bit squishy, but takes effort to compress. That puts it ptobably in the category of either XLPE or EVA foam.

    Cross-Linked Polyethylene (XLPE)

    • Smooth outside, super fine closed-cell texture
    • Somewhat difficult to compress, bounces back fast
    • Used in stuff like Pelican case inserts, insulation, flotation pads
    • Basically waterproof, holds up well to abuse

    EVA Foam

    • Slightly softer and more flexible than XLPE
    • Still dense, but easier to push in
    • Shows up in gym mats, cosplay armor, cheap padding, shoe soles
    • More likely to soak up a little moisture if submerged

    How to Tell Them Apart
    Thing to Check XLPE EVA
    Texture Finer, more uniform A bit more irregular
    Surface Feel Smooth, maybe a little glossy Matte, slight texture
    Water Resistance Almost totally waterproof Mostly, but not quite as good
    Squish Factor Firm, takes effort Softer, more give
    Nail Press Test Barely leaves a mark Leaves a temporary dent

    Quick DIY Tests

    • Water dunk: If it stays dry, probably XLPE. If it soaks even a little, probably EVA.
    • Fingernail press: XLPE resists. EVA gives in for a second.

    If you know what this piece came from (like a shipping insert, exercise mat, insulation panel) that can help narrow it down even more. Let me know and I will give it a shot.

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