The plant was used for processing sand destined for the Pilkington glassmaking factories in St Helens. Its function was to produce material of consistent quality, which meant getting rid of oversized or undersized particles, blending different batches, and washing off surface-bound iron impurities which would otherwise make the glass too green. The sand itself came from various nearby sandpits on the Lancashire plain. The plant closed sometime during the 60s.
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