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Furthermore some plastics could lend to the creation of mixed materials of considerable interest. Among them probably the most interesting was the ''[[Makrolon]]'' (the name used by Bayer) version introduced in [[1966]] by [[Lamy]] for his famous [[Lamy 2000]] model, a mixed fiber glass polycarbonate with high mechanical strength, and a particular black/gray color coming from the weaving of the glass fibers.

Furthermore some plastics could lend to the creation of mixed materials of considerable interest. Among them probably the most interesting was the ''[[Makrolon]]'' (the name used by Bayer) version introduced in [[1966]] by [[Lamy]] for his famous [[Lamy 2000]] model, a mixed fiber glass polycarbonate with high mechanical strength, and a particular black/gray color coming from the weaving of the glass fibers.

Al giorno d'oggi la gran parte delle penne viene realizzata in una qualche resina plastica, più o meno lucida o resistente a seconda della realizzazione. L'evoluzione della tecnica consente anche di creare plastiche colorate la cui brillantezza e varietà di colori ha ben poco da invidiare alla celluloide. Tutte queste però restano realizzazioni industriali il cui valore effettivo resta discutibile, per quanto una azienda possa sostenerne la ''preziosità''. La celluloide infatti, per i tempi lunghi di lavorazione e l'impossibilità di lavorazione con iniezione a stampo, resta un materiale molto più prezioso di qualunque resina plastica, ed è anche per questo che ha visto un ritorno al successo negli anni recenti, come caratteristica distintiva di alcune produzioni (in particolare quelle della Visconti) di penne di lusso.

Nowadays almost all pens are made in some kind of plastic resin, more or less shiny or resistant depending on the implementation. The evolution of technology also allows the creation of colorful plastics, whose brilliance and variety of colors has little to envy to [[celluloid]]. However, all of these are fully automated industrial productions, with a very low production cost, regardless of how someone can call them "precious". The celluloid long production times and the impossibility of its processing by injection mold, made it a much more expensive material, and this is also why there was a return to it in recent years, as a distinctive feature of some luxury pens.

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