| ▲ | bradrn 2 hours ago | |||||||
In fact, I believe that the article is describing a reinvention of this technique! Just with a plotter on oil rather than a compass on plastic. | ||||||||
| ▲ | Sardtok 3 minutes ago | parent [-] | |||||||
He did it on plastic CD cases, not oil. The oil in the beginning of the article was just for explaining the refraction that happens with the ridges in the structure. | ||||||||
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