You don't need much patches to create a good printer profile

[pharmacist]

Hi @Ink stained Fingers The 10x15 cm target is already up to the maximum I can do (192 patches). The i1iO target can be easily scanned with the manual method using the scanning board. I have done that alrady many times. The normal target patch set using the scanning board is without separation bars, which I do not like, especially when two colours that are very closed to another there is sometimes a problem because the spectro sees it as one patch throwing an error when finishing the row scanning. The separation bars between patches is very usefull to counter this problem.

According to my calculation a target for 13x18 cm photo card (5x7 inch) should hold up to 285 patches (15 rows of 19 patches). The RGB colour cube can be extended up to 6x6x6 (216 patches) + 15 grey steps between RGB 0,0,0 and RGB 255,255,255 and also can hold 9 triplets of near neutral patches of RGB (27) + 9 triplets of near neutral patches of CMY (27) around the neutral axis up to 285 patches in total for an even better sampling of the RGB colour cube around the neutral axis.

For the A5 target to be optimized for the i1iO2 I think just over 400 patches should be possible.

 

[Ink stained Fingers]

I'm not using 5x7 inch cards, and I'm quite happy with a patch sheet with 283 patches on A5; I don't think I need an upgrade here at this time. That was an import of a standard profile of the old ProfileMaker package. I remember from longer time ago that missing separation bars were impacting the reliability of the scanning process, but that proglem is gone.