i wanna have fun without getting in trouble!
you are talking about the thing you look through.. it will depend on what you are wearing. Like hcj, arai, shoie the visor on a full helmet is what you look through and those can be purchased at where you got your helmet. its usually an item that has to be ordered but the shop will have a booklet you can look through you named the perfectly. it is a visor! I have a mirrors blue one! on my shoie I would post a link to visors but I don't know what kind of helmet you have. you can ask some of the guys in my motorcycle club, they get all kind of hook ups on deals
as far as my knowledge goes ion exchange resins are used in the conversion of hard water to soft water. these resins are of two types anion and cation exchanges.anion exchange resins are mostly made of -OH groups and cation exchange resins have -COOH groups.they can be revived after they are used up using specific quantities ofconc.H2SO4 ( for caation exchange resin) and conc.NAOH or NA2CO3 ( for anion exchange resin). the water obtained from this method is called deionized oe demineralised water. CHEERS!