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The pen that more than any other is considered the prototype of plastic resins fountain pens, is the famous [[Parker 51]], created in 1939, but marketed extensively only since 1941. The body of the pen, so as the section and the shell that protects the [[hooded nib]] was realized in ''"[[Lucite]]"''.  

The pen that more than any other is considered the prototype of plastic resins fountain pens, is the famous [[Parker 51]], created in 1939, but marketed extensively only since 1941. The body of the pen, so as the section and the shell that protects the [[hooded nib]] was realized in ''"[[Lucite]]"''.

But [[Parker]] was not the first manufacturer to use these new materials, well before the official launch of [[51]], in 1939, [[Waterman]] launched the [[Hundred Year]] model, also produced with the same material, [[Lucite]], which was probably the first major model produced in plastic resin. Another great success plastic resin model was the  [[Eversharp]] [[Skyline]], made in [[polystyrene]]. Since the '50s, most manufacturers began to abandon [[celluloid]], which until then was the dominant material, to switch to the use of different kind of plastic resins.

But [[Parker]] was not the first manufacturer to use these new materials, well before the official launch of [[51]], in 1939, [[Waterman]] launched the [[Hundred Year]] model, also produced with the same material, [[Lucite]], which was probably the first major model produced in plastic resin. Another great success plastic resin model was the  [[Eversharp]] [[Skyline]], made in [[polystyrene]]. Since the '50s, most manufacturers began to abandon [[celluloid]], which until then was the dominant material, to switch to the use of different kind of plastic resins.

When plastic resins entered the market, they showed considerable advantages, first of which was the ease of the their processing. Parts which could be made with injection molded plastic 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 plastic resins entered the market, they showed considerable advantages, first of which was the ease of the their processing. Parts which could be made with injection molded plastic 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.