The addition of ethanol, which is fully miscible in water yet, less polar than Water reduces its solubility. This reduction of solubility results in precipitation of least soluble salts first or the salt which is not soluble in solvents less polar than water.
Pole pockets on banners are something that can cause a bit of confusion. This is compounded by the fact that some companies do things differently when producing banners with pole pockets.
Nylon Pole Sleeve American Flags - These heavyweight Nyl-Glo American flags come with a pole hem rather than brass grommets and will fit most wood, aluminum and fiberglass poles. They come with a 1-year colorfast guarantee and are available in two popular sizes.