An experimental survey was developed to determine optimal operational conditions when extracting tanning materials from milled divi-divi pods with a 10% (v/v) alcohol-water solution. The study included runs at both laboratory and pilot levels. The percentage of extracted tanning materials from samples was measured when varying the following variables : (1) temperature, (2) solvent to solute ratio, (3) extracting time, (4) type of solvent, (5) agitation, and (6) average particle size. The optimal values were as follows : 50 degrees C, 120 cm(3) of solvent : 1 g of divi-divi, 20 min, 10% (v/v) ethanol-water, agitation on, and 0.087 cm average particle size. The maximum yield of extracted tanning materials was 54% by weight (dry basis) when divi-divi pods up to 6 months old were used, but the tannic content in pods decreased by 15% and 32% after 12 and 42 months of storage respectively.