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When they entered the market plastic resins showed considerable advantages, first of which was the ease of the processing. Parts which could be made with injection molded platic favored the industrialization of the production at much lower prices. Furthermore, these new plastics were also much more resistant to the corrosive agents; in fact one of the reasons for which the [[Parker 51]] resorted to ''[[Lucite]]'' was the need to resist the corrosive effects of a new fast drying ink, introduced together with the pen.

When they entered the market plastic resins showed considerable advantages, first of which was the ease of the processing. Parts which could be made with injection molded platic favored the industrialization of the production at much lower prices. Furthermore, these new plastics were also much more resistant to the corrosive agents; in fact one of the reasons for which the [[Parker 51]] resorted to ''[[Lucite]]'' was the need to resist the corrosive effects of a new fast drying ink, introduced together with the pen.

The plastic resin main disadvantage, at least at the time of their introduction, was not being able to be produced in anything that some solid color. But this turned out to be a minor problem, because in that same period the stylistic trends, even for the birth of these new materials, began to be oriented towards a modernist and minimalist style, so colorful celluloid models began to be seen as a bit antiquated.

The plastic resins main disadvantage, at least at the time of their introduction, was the impossibility to produce them in anything but some solid colors. But this turned out to be a minor problem, because in the same period the stylistic trends, even for the birth of these new materials, began to be oriented towards a modernist and minimalist style, so colorful celluloid models began to be seen as a bit antiquated.

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.