Cold water soaking should be careful, preferably cool boiled water, rather than direct raw water, was soaked pineapple is usually already cut into pieces, if there are bacteria in the raw water, may contaminate the pineapple. Pineapple cut, the fruit eye shallow and small, the interior is light yellow, thick flesh and core fine pineapple for high quality products; poor quality pineapple fruit eye deep and more, the internal organization of the gap is larger, thin flesh and core coarse; immature pineapple flesh is brittle and hard and white.
Quality pineapple fruit is cylindrical or both ends slightly pointed ovoid, size uniform moderate, fruit shape is correct, the number of bud eye is small. The skin of pineapple with good maturity is light yellow or bright yellow, slightly greenish at both ends, and the crown buds on the top are greenish-brown; the outer skin of raw pineapple is iron-green or slightly brownish in color.
If the fruit of the pineapple protrudes to the top of the full, the skin turns yellow, the flesh becomes soft, orange-yellow, that it has reached nine ripe. Such a pineapple has more juice, high sugar content, strong aroma and good flavor. If not immediately consumed, it is best to choose the fruit body is still hard, color light for light yellow with green luster, about seven or eight ripe varieties are good.