Aspinwall & Co. Ltd. - Coffee Division manufactures Unwashed Robusta Cherry PB Bold Grade Coffee. Unwashed Robusta Cherry PB Bold Grade Coffee is provided with the standard of 100% by weight retention on a sieve with oblong holes of 4. 50mm. The garbling status of Unwashed Robusta Cherry PB Bold Grade Coffee is clean garbled. The PB triage quality of this grade of coffee is 2% by weight. Raw coffee beans undergo curing process and are graded based on size of beans, type of defect and % defect imperfection better known as grades of coffee.