Yes Plastisol does absorb as much as 50% of water by volume and particularly plastics with a high granular salt content, (senkos). The color dyes almost immediately blanch and dissolve out, but the plastic itself even though it becomes degraded (soft and gooey), disintegrates very, very, slowly. Some of the soft plastic lure companies recognize the potential environmental issue regarding this and have designed formulas that disintegrate in water. They unfortunately are more expensive and have issues with color, scent and structural integrity. ( they are REALLY soft, and do not store well. ) The future for soft plastic baits is already a talking point in many states and especially in Canada and California. There is the potential for banning if a satisfactory chemical biodegradable formula is not developed. There is also the issue that scents and especially pheromone additives make the discarded plastics an even more difficult problem as they continue to attract after they have been lost or disposed of in the environment. The issue of biodegradable lures is not a new one and may rear it's ugly head soon.
bodfish