I picked my favourite cardstocks for pencil colouring (the W H Smith & the two Southfields in the top row) & then a selection of cardstocks normally recommended for use with alcohol markers (the three in the second row & the single in the third). Each piece of cardstock is labelled & the various test pieces all marked according to pen type except for the quartet of squares bottom right on each swatch - this was an afterthought where I used a Faber-Castell Polychromos black pencil, blending the top left square with a tortillon & then doing the same but also pulling the colour out from the bottom right square into the bottom left square. I hope that my explanations are sufficiently clear but if not please do not hesitate to ask.
I wanted to see how the Sakura Pigma Micron Pen compared with a similar ordinary fineliner pen available off the shelf from a good Stationers - in this case a Pilot V5 Hi-tecpoint. Of the two I much prefer the Pigma Micron for it has a far superior feel in the hand & has a more consistent line when applied to cardstock. It also has the advantage of being available in differing line widths & is marketed as being waterproof & fade proof. The Pilot's barrel gives no indication of anything but the name. I'd use the Pilot for rough drafts & when practising a new pattern but not for 'proper' tangled artwork.
I was astonished by the cardstock results with the best one, in my opinion, being the relatively inexpensive W H Smith 220 gsm White Card which is readily available throughout the UK.
The W H Smith cardstock gave the most even coverage when it came to filling in solid areas with the Pigma Micron & also gave a nice crisp distinct line. The Polychromos pencil also blends very well on this as there is a little tooth in the surface.
The two Southfield cardstocks, if anything, gave crisper & more distinct lines but disappointingly caught & started to pill the surface when it came to filling in a solid area. The Polychromos pencil blends beautifully on these & a little more evenly than the W H Smith but it is quite a marginal difference for me. When it comes to stamping detailed images these cardstocks are magnificent & I prefer them to the W H Smith but that wasn't what I was testing for here.
The remaining four cardstocks were all rather disappointing when it came to filling in an area, for the coverage was patchy with the pen's ink seeming almost to pool & stick in areas. To my astonishment there was feathering of the ink on the Neenah & a clear distinct line almost impossible to achieve. None of these four cardstocks allowed the Polychromos pencil to blend smoothly either for they were somehow almost too slick.
These differences may not be visible from a distance or to a non-crafter but in my opinion they affect the overall experience of creating & ultimately the artwork produced as a whole.
I include close-ups of the what I deemed the 'best' (W H Smith) & the 'worst' (Neenah). In all the photos I have edited out as much of the shadowing as possible & increased both definition & sharpness settings to the maximum.