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Structured PE sheets with square posts that are either ~2 µm (left) or ~10 µm tall moulded from LDPE on top of a 100 µm thick UHMWPE sheet. A single metallic square taped to a hot oven is used as a feature to determine approximate scattering and attenuation—virtually no thermal scattering, but high attenuation is achieved with these rectangular and vertical pillars.
