Storage of raw materials of wet blue is uncontrolled because the amount of raw material stored exceeds the capacity of the storage space. This also causes the handling of wet blue in the storage space is not optimum so that the wet blue has encountered defects, dry, fungus and bacteria and salt stain. The purpose of this research is to improve the process of storage of wet blue for the production of leather upper as the first step to support the production of leathers with good quality. Wet blue storage technique is improved by descriptive analysis with library studies related to the physical and chemical characteristics of wet blue and the environmental effects of wet blue during storage. Storage techniques are supported by efficient planning and ordering mechanisms of raw materials and according to production needs and storage space capacity. Material Requirement Planning (MRP) or proper raw material planning can determine the order of raw materials and the amount of efficient inventory. Storage space with a capacity of 18.000 sides is only filled with a capacity of ± 10.000 sides. Optimization of storage space with efficient layout can be allocated to provide space for raw material selection in storage space.
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