The floats need to vary equally between specific gravity of about 1.0~1.2. Specific
gravity is adjusted by blending light and heavy density matter in an appropriate ratio.
The lighter material is glue for melt guns. The specific gravity is less than 1.0. The
heavier one is a free resin. It softens when warmed with hot water, etc, and hardens when
By boiling and mixing these materials, we can create a material with a certain specific
gravity. However, the produced material is not completely homogeneous, so by rounding this
material into pellets, we can make pellets is with different specific gravity.