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Raw materials are materials that have been harvested from the earth. Lumber, metal ores, and grain are all examples of raw materials. Processed materials are materials which have been refined or built by humans from raw materials.Examples would include paper, steel, or glass.rocessed materials are materials which have been refined or built by humans from raw materials.
Saturday, August 13, 2011. The raw materials used in fermentation constitute the substrates for the fermentation process. The substrates could be seen as either the raw materials that will be ultimately transformed into the desired fermentation products or they could be regarded as the source of nutrients for the fermentation microorganisms.