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One of the criteria with which the filling system is chosen, especially in recent pens, is that of its capacity. It is also one of the criteria on the basis of which we most frequently take sensational dazzles, also because there is a widespread prejudice that a [[piston filler]] pen contains much more ink than a [[cartridge filler]] one, which, with pens on the market today, is almost never true.  

One of the criteria with which the filling system is chosen, especially in recent pens, is that of its capacity. It is also one of the criteria on the basis of which we most frequently take sensational dazzles, also because there is a widespread prejudice that a [[piston filler]] pen contains much more ink than a [[cartridge filler]] one, which, with pens on the market today, is almost never true.  

The following table of cartridge capacity is used as a reference (the measures mentioned have been collected on the internet, and have not yet been verified with the methodology adopted later; when they will be, the relevant column will be updated):

The following table of cartridge capacity is used as a reference. The measures mentioned have been collected on the internet, and have not yet been verified with the methodology adopted later (weight difference between full and empty); when they will be, the relevant column will be updated:

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! Brand !!  Type !! Capacity !! Verified

! Brand !!  Type !! Capacity !! Verified

|-

|-

| [[Pelikan]] || short || 0,77 ml || no

| [[Pelikan]] || short || 0.85 ml || yes

|-

|-

| [[Parker]] || long || 1.47 ml || no

| [[Parker]] || long || 1.47 ml || no

|-

|-

| Internazional || long || 1.66 ml || no

| Internazional || long || 1.66 ml || no

|}

|}

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For this reason it was decided to start a collection of measures of the actual ink capacity of pens, but for a measure to qualify as such (and not be reduced to a simple statement), it must be repeatable, so in addition to the results of the same, the methodology used to obtain it must also be detailed.

For this reason it was decided to start a collection of measures of the actual ink capacity of pens, but for a measure to qualify as such (and not be reduced to a simple statement), it must be repeatable, so in addition to the results of the same, the methodology used to obtain it must also be detailed.

First the pen was weighed completely empty, washed and left to dry completely so as to avoid any residue due to liquid remaining in the [[feeder]]. Left to dry completely means holding the pen upside down with the nib resting on a sheet of absorbent paper for at least a week, so as to exclude any residual water.

First the pen was weighed completely empty, washed and left to dry completely so as to avoid any residue due to liquid remaining in the [[feeder]]. Left to dry completely means holding the pen upside down with the nib resting on a sheet of absorbent paper for at least a week, so as to exclude any residual water.

Then the pen has been filled with running water. For a comparison that takes into account the liquid remaining in the feeder, the weight was measured several times starting from the first filling of the empty and dry pen, repeating the loading and unloading cycles.

Then the pen has been filled with tap water. For a comparison that takes into account the liquid remaining in the feeder, the weight was measured several times starting from the first filling of the empty and dry pen, repeating the loading and unloading cycles.

The filling was carried out normally as you do when you load the ink for writing, removing the excess liquid from the feeder (shaking it slightly to drip and placing the nib near the neck of the bottle to remove excess) and drying the one that may be present on the section. An ordinary bottle of ink was used (Waterman 50 ml, but any one is fine, just soak the pen tip completely in it).

The filling was carried out normally as you do when you load the ink for writing, removing the excess liquid from the feeder (shaking it slightly to drip and placing the nib near the neck of the bottle to remove excess) and drying the one that may be present on the section. An ordinary bottle of ink was used (Waterman 50 ml, but any one is fine, just soak the pen tip completely in it).

==Results==

==Results==

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{| class="wikitable" style="float:center

{| class="wikitable" style="float:center

!style="width: 20%"|Pen

!style="width: 22%"|Pen

!style="width: 10%"|Type

!style="width: 8%"|Type

!style="width: 17.5%"|Empty

!style="width: 13%"|Empty

!style="width: 17.5%"|Filled

!style="width: 13%"|Filled

!style="width: 17.5%"|Unloaded

!style="width: 13%"|Unloaded

!style="width: 17.5%"|Capacity

!style="width: 13%"|Capacity

|-

|-

| [[Pelikan 140]] ||[[piston filler|piston]]|| 14,33 ± 0,01 g || 15,98 ± 0,04 g || 14,59 ± 0,03 g || 1.65 ± 0,05 ml

| Pelikan M750  || [[piston filler|piston]] || 26.04 ± 0.01 g || 27.68 ± 0.02 g || 26.38 ± 0.01 g || 1.64 ± 0.03 ml || 1.31  ± 0.03 ml  

|-

|-

| [[Duofold]] ''De Luxe''||[[button filler|button]]|| 22,10 ± 0,01 g || 24,00 ± 0,03 g || 22.35 ± 0,03 g || 1.90 ± 0,04 ml

| Pelikan M800  || [[piston filler|piston]] || 29.13 ± 0,01 g || 30.77 ± 0.02 g || 29.54 ± 0,02 g || 1.64 ± 0.03 ml || 1.23  ± 0.04 ml  

|-

|-

| [[Lamy 2000]] ('60s) ||[[piston filler|piston]]|| 20,88 ± 0,01 g || 22,68 ± 0,02 g || 21,59 ± 0,02 g || 1.80 ± 0,03 ml

| [[Pelikan 400]] || [[piston filler|piston]] || 14.45 ± 0.01 g || 17.61 ± 0.02 g || 15.67 ± 0.01 g || 2.16 ± 0.03 ml || 1.94  ± 0.04 ml  

|-

|-

| Pelikan 481  || [[piston filler|piston]]   || 12,97 ± 0,01 g || 14,60 ± 0,01 g || 13,29 ± 0,01 g || 1,63 ± 0,01 ml

|[[Montblanc 149]] (post '95)|| [[piston filler|piston]] || 29.95 ± 0.01 g || 32.01 ± 0.01 g || 30.45 ± 0.02 g || 2.06 ± 0.02 ml || 1.56  ± 0.04 ml  

|-

|-

|}

|}

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{{CategorizeArticle|Principianti|Misure}}

{{CategorizeArticle|Principianti|Misure}}