Modifiche

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.  

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]], [[galalith]] and [[celluloid]], to pass in the '40s to the most common [[plastic resins]] still in use today.  

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