21 September 2013
The City in the Middle of the Crystal Sea
The shiny black oil is ferrofluid - a suspension of tiny iron particles in oil with a surfactant to hold it together. Magnets are placed out of shot to make the spikes.
The shiny black oil is ferrofluid - a suspension of tiny iron particles in oil with a surfactant to hold it together. Magnets are placed out of shot to make the spikes.
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