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.
pole. 1  boom - From Dutch, originally a long beam or pole. 2  pogo stick - Came onto the scene around 1921, but is of uncertain etymology, possibly from pole and go.. 3  pole position - Refers to pole as the term for the inside fence on a racecourse.  trolley pole - The pole sticking up from a bumper car.