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i.fe"fe.- <br />[iws. <br />f.f:-^<ty <br />•f: <br />•>? <br />■i.^j <br />>y <br />'k' <br />M <br />«-Vr , ■■ ■».-ri. <br />s,. <br />Although 3 Ibs./cu.ft. absorption is obtainable with no add^ expense, <br />hopefully continued efforts will allow the maximum absorption requireinents to <br />be reduced even lower. <br />In interpreting the test results it should be noted that the test is run in <br />cemtrolled water conditions and there is no additional effect due to erosive <br />deterioration by normal conditions such as wind blown waves, boat <br />debris, current, ducks, fish, stone crabs, other sea creatures, muskraw, <br />gasoline, boat hooks and miscellaneous other deteriorating forces all or which <br />cause loss of foam beads and loss of flotation. <br />Foam absorbs water in two ways. First is by the water filling the void space <br />between the foam beads. Good foam has small voids, poor foam has large voim. <br />If the be^ are poured in and not expanded there is about 40% voids. After <br />the initial filling of the voids with water there is a very sl^ absorption of <br />moisture into the outer shell of each individual <br />the absorption test charts, most of the voids are filled within 30 days <br />after that the beads slowly absorb water. All beads do not seem to aMorb <br />moisture at the same rate so bead quality does have sane effect on absorption. <br />DESIRED <br />t <br />ACTU frL <br />te -8-