These are writing samples using just a single unit of each model of LAMY EF nib I have, without any claim or implication that one unit of (say) Z55 EF nib will be identical or comparable with a different unit of such.
The first six nibs were all fitted in turn onto the same feed on the same pen drawing from the same reservoir (i.e. converter) of LAMY Benitoite ink. Each nib was cleaned in a dilute solution of ammonia and detergent and patted dry on a paper towel immediately before fitting on the LAMY cp1 pen used, then pressed against a paper towel until the ink being drawn through is dark enough, then written with on another sheet of Rhodia Dotpad 80g/m² paper until the colour and flow appear stabilised.
The last of the nibs listed is the EF nib that came fitted on my LAMY 2000 blue Bauhaus pen.
There are discernible but relatively minor differences between the ink flow and output of the first six nibs; the LAMY 2000's EF nib is what stood out as glaringly different, and incidentally I find its output the least pleasing.
The first nib is somewhat scratchy, to the point that it ripped and picked up fibres from the paper surface from time to time. I don't suppose every Z50 EF nib is equally as damaging, but I didn't feel like either going through my other Z50 EF nibs to find a better, smoother unit to test, or modifying the nib such that it is significantly different from factory condition (or at least as it was supplied to me by the retailer) by smoothing it with micro-mesh.
The Z52 and Z53 nibs are both harder than the Z50 nib, but can put down lines that are at least equally as broad when pressed.
The gold nibs feel softer than the steel nibs, and I can physically see more elastic deformation in the body when they are pressed, but their tines don't spread as far apart and thus the "maximum" line widths are not as broad.
Even though there has been several reports that the EF nibs on LAMY Dialog 3 pens — which use Z55 nibs — exhibit the characteristic of an architect's grind, in that lines left by downstrokes are narrow and cross-strokes wider, the one I tested proves not every Z55 EF nib is like that. (I have two Z55 EF nibs, but I haven't looked at the other one yet; it's on a new pen that only arrived on the weekend.)
The Z57 EF nib tested had more of the Sailor Zoom nib-like quality, in that the incident angle between nib and page changes the line widths of cross-strokes notably.
The Lamy 200 EF nib is wettest and broadest of them all, and has the least potential for delivering line variation through hand pressure moderation or fluctuation. Ugh.
I just tested another Z50 EF nib, and it was as scratchy as the one used above. Alrighty then, micro-mesh it is.
All better now.
Edited by A Smug Dill, 23 December 2019 - 04:37.