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Demonstrator pens are pens which are partially or mostly 
Demonstrator pens were originally furnished by manufacturers to dealers, so that the features of their products could be shown to potential buyers. The first demonstrators had openings cut in their barrels, and usually, their caps. These would typically allow direct viewing of the filling mechanism and the section-inner cap junction, respectively. Cutaway demonstrators were usually not fully functional pens, and many were furnished without nibs or with nonfunctional dummy nibs.
The first transparent demonstrator pens were probably Parker's Bakelite-barreled eyedropper-fillers, which were soon made a regular production model. Most transparent demonstrators, however, postdate the general adoption of
Ancora "Acqua" Demonstrator
Pens {{Tool-stub
transparent
Transparency, transparence or transparent most often refer to:
* Transparency (optics), the physical property of allowing the transmission of light through a material
They may also refer to:
Literal uses
* Transparency (photography), a still, ...
.
Demonstrator pens were originally furnished by manufacturers to dealers, so that the features of their products could be shown to potential buyers. The first demonstrators had openings cut in their barrels, and usually, their caps. These would typically allow direct viewing of the filling mechanism and the section-inner cap junction, respectively. Cutaway demonstrators were usually not fully functional pens, and many were furnished without nibs or with nonfunctional dummy nibs.
The first transparent demonstrator pens were probably Parker's Bakelite-barreled eyedropper-fillers, which were soon made a regular production model. Most transparent demonstrators, however, postdate the general adoption of celluloid
Celluloids are a class of materials produced by mixing nitrocellulose and camphor, often with added dyes and other agents. Once much more common for its use as photographic film before the advent of safer methods, celluloid's common contemporary ...
for fountain pen manufacture. Parker and Sheaffer both made fully transparent versions of their best-selling Duofold and Balance models in the early 1930s. Other demonstrators were only partially transparent, the transparency highlighting the pen's special features. Examples include the transparent-barreled Parker Vacuum Filler demonstrators (showing the filling mechanism) and the Parker 51 demonstrators with transparent hoods (showing the collector).
In recent years, transparent fountain pens have become very popular. In Pakistan
Pakistan ( ur, ), officially the Islamic Republic of Pakistan ( ur, , label=none), is a country in South Asia. It is the world's fifth-most populous country, with a population of almost 243 million people, and has the world's second-lar ...
, Dollar Stationery makes the 717i (Demonstrator), variations of the 717i pens, the other being the calligraphy version called 717i قلم. The demo and normal versions are very popular unlike the calligraphy version. In contrast to the past, where demonstrator pens were made in very limited numbers and not sold to the public, these pens are regular production items, though sometimes made as limited editions. This trend may be traced back to Pelikan's transparent green M800 and transparent blue Blue Ocean M800 of 1992.
External links
Ancora "Acqua" Demonstrator
Pens {{Tool-stub