It contains minerals such as pyroxene, amphibole, feldspar and 63-68 percent silica. The eruption temperature for dacitic lava is 1,500 to 1,800 degrees Fahrenheit. Dacitic to rhyolitic lava is so dangerous because it contains a high amount of crystals.Mt. Vesuvius erupts according to the Plinian model of eruption.
Foil has low emissivity, so will greatly reduce radiative heat transfer (act like insulation). It should face the side that is supposed to be cooler. But foil will not reduce conductive heat transfer, so it must be used judiciously with something that reduces conduction.
Bubble foil insulation is an option of reflective foil insulation keeps heat out in the summer and keeps heat inside in the winter. EcoFoil reflective bubble insulation uses a combination of radiant barrier (reflective foil) along with a single layer of bubble insulation or a double layer of bubble insulation to reflect heat. Both are available in single and double bubble layers. Various size rolls are also available.