Modifiche

In addition to differentiating itself for the various forms adopted by the producers, the barrel has also undergone the evolution in the use of the [[materials]] used in the construction of the fountain pens, of which it constitutes the largest component. At the dawn of the fountain pens it was mainly made of [[hard rubber]] like the rest of the pen, a material that guaranteed, having to serve as an ink tank, the necessary chemical resistance.  

In addition to differentiating itself for the various forms adopted by the producers, the barrel has also undergone the evolution in the use of the [[materials]] used in the construction of the fountain pens, of which it constitutes the largest component. At the dawn of the fountain pens it was mainly made of [[hard rubber]] like the rest of the pen, a material that guaranteed, having to serve as an ink tank, the necessary chemical resistance.  

Con lo sviluppo della tecnologia sono stati utilizzati poi tutti gli altri [[materiali]], a partire dal [[metallo]] (le prime furono probabilmente le [[Wahl Metal Pen]]), alle prime resine artificiali come [[bachelite]], [[galalite]] e [[celluloide]], per passare negli anni '40 alle più comuni [[resine plastiche]] in uso ancora oggi.  

With the development of the technology all the other [[materials]] have been used then, starting from the [[metal]] (the first were probably the [[Wahl Metal Pen]]), the first artificial resins such as [[bakelite]], [[galalite]] and [[celluloid]], to pass in the '40s to the most common [[plastic resins]] still in use today.  

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