Factors affecting the pressure extraction of oil from flaxseed

and summary The effects of moisture content, age, growing location, and genotype of flaxseed on the efficiency of pressure extraction of oil, when extracted in a Carver press cylinder, were examined. Decreasing the seed moisture content from 7.8% to 2.3% increased the proportion of oil extracted from 31.4% to 49.6%, respectively. Oil was more difficult to extract as the age of the seed increased. The proportion of the total oil extracted varied from 25.0% to 41.4% depending upon the location where the seed was grown. The effect of genotype was less pronounced, ranging from a mean of 46.9% in Redwing to 54.2% in Redwood 65 for samples analyzed at normal storage moisture. Samples with high oil contents usually yielded the highest proportion of total oil recovered (r=0.893 ** , 9 df).