For red wines and most importantly those that have truly aged as they should using a wine decanter to remove the sediment and enhance the flavor is an absolute must. The process of decanting will remove the impurities while the extra surface area having access to the oxygen in the air will enhance and bring out the best taste possible for the bottle of wine.
For years the best wine decanters were made of crystal and this crystal had lead added in during the manufacturing process in order to make it easier to work with and adds more sparkle to the glass. Of course we all know now that exposing the human body to lead is dangerous so lead based wine decanters are not recommended for use. Though these older crystal decanters are still beautiful to look at and make excellent collectible using them for decanting is not recommended.
Now most wine decanters are still made from crystal but this crystal no longer utilizes lead in the manufacturing process. In order to get a beautiful shine on the glass now hand polishing is required making the companies that produce such wine decanters the choice ones to select for your wine decanting in order to get a beautiful glass that will not potentially give you lead poisoning.