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I have now finished the new profile on Museo Portfolio Rag with a 578 preprofile and then embedded in the 1156 profile on LetterR (I did at last find that command that makes the chart horizontal! For A4 A4R). g64 (the old profile g128). The patches are 7.8mm wide. Enlarged the print 99% in the...

What I mean is that in the first view you have showed in Gamutvision in the upper right the rendering of the colors aren't even and smooth with the profile I tested myself. compared it to profiles you tested for me. I called this 'banding'. Yes that's what I found out also. I've listened to...

I have now tested one of my 'old' profiles with Gamutvision (trial version). I tried to use the same settings as Roger. The profile I tested was one with 1440 patches about 6.9mm wide on Canson Baryta and two A4 papers. This profile was one of my best profiles visually on the test print. The...

This is for the profile made with three A4 papers (1152 patches with preprofile). This profile D-max 2.13 compared to the other 2.12. But it seems to be more linear especially in the green and reds. I do not exactly know what Argyll does with the preprofile but I can visually see especially that...

Very kind of you analyzing my profiles! I can see now that I did send the 'wrong' Canson Baryta profile the first time but still interesting how it fared and it fared well! The first one I sent was made with a preprofile on A5 and then I used one A4 chart with 720 patches. The one I intended to...

I have used a very common chart the one with portraits of children in the lowest row. The portrait I'm talking about is rather good as it has a great dynamic range. Roger thank you very much for your analyze! It seems as the variant with bigger patches is as good as the other with more patches...

OK! Here I have two profiles that I think could be interesting. One is made on the Canson Baryta Photographique in two steps. First a preprofile with 576 patches on A4. This one is used in the second 1152 patches profile on two A4 papers. The second profile I made on a matte paper Museo...

That is exactly what I've been trying to do :) ! I have valued those test prints as subjectively 'better'.

The example I can give is that when I made a profile from an experimental chart with 800 patches on Museo Portfolio Rag (a smooth matte paper) I got Peak err = 1.151, avg err = 0.2692, RMS = 0.3111 and no misreads at all (7mm wide patches). When I made the same with a very similar chart and...

I don't know how to post them as text files. Please tell! What are you analyzing? I'm thankful for all help. I think this thread has been a lot about how to squeeze as many patches as possible on an A4 (or Letter) paper) in an assumption that 'more is better'. To be able to do that it's...

OK I think I can buy that! It's actually my own thought that the reflections may be insignificant. The proof is to make the experiment but I may be to lazy to do it. Anyway I think it's a good practice not to make the strips/patches too narrow. It's important to position the meter carefully to...

The clearance from the head of i1 Pro in the ruler to the chart is about 0.5mm. The measurement opening is 4.3-4.4mm. If the illumination is 45 degrees then I calculate that the paper is illuminated with a diameter about 5.4mm (in the spec they say 4.5mm and 6mm respectively but I measure it a...

An idea could be to paint or glue some black fabric in the slot to reduce reflections. The opening it's too wide anyway. I've now managed to make an A4 chart for the i1 Pro with 968 patches 22 in the row and 44 rows. The patches are 6.9 mm wide. Printtarg a0.84 and a custom paper size 370x235mm...

My afterthought is that this black mask may not be completely "black" and may reflect some light and disturb the reading. I'm trying to get the strips at least 7mm wide.

At last is something happening in this thread! I will try do do this with the ruler to i1 Pro. Put black card under the opening of the reading slot to get better readings. Great! I will try this also! Per

I have edited my earlier posts. The differencies are very small and the profiles made with ArgyllCMS are very similar. Maybe the "preconditioned" profile and the one with double amount of patches on two papers are a little better but it's difficult to see with bare eyes. I haven't analyzed the...

Yes I think so also, maybe more patches especially with the good ruler that comes with the instrument. I didn't care or want to crop and resize the chart but used the commands in Argyll. What I could try is to to change the size of the patches and then print borderless to get them bigger (I...

What rendering intent did you use in the printer driver? My little experience with ArgyllCMS is that it becomes darker when you use "Perceptual". Try "Relative Rendering Intent" with Black Point compensation (you can try also without maybe with this paper) when you print with your profile and...

Hi, The comments from Roger has been very helpful and the links from Roy are valuble I think not only for me. Actually I think it's quite relevant to say: "Do your homework" like Roy did. Theory is one thing but it's very interesting to hear how other more experienced than me deal with the...

When I look at the image above I do very much prefer the curve with BPC on. Doesn't that contradict what you say in the quote?