On Youtube there are videos of people who have made cotton wool Pykrete. Instead of sawdust they used cotton. I wonder if you could use Hemp, carbon fiber, or fiber glass as well? The problem with fiber glass is you would have tons of tiny shards of glass all over after it melts.
I also wonder about how to use it to keep ice, ice for longer. I am thinking like those Ice Castles that they build in Utah during winter. Where they have LED's in them and they are cool looking, but I wonder if you can make them last months longer than when they would normally melt away.
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