thebestcpu
Getting Fingers Dirty
- Joined
- Dec 8, 2024
- Messages
- 80
- Reaction score
- 47
- Points
- 40
- Printer Model
- Epson SC P900
From the name, you might think it has to do with black levels - and it does - a bit.
Before the details of the experiment, here are a couple of updates.
1) I changed the secondary axis from the prior post from -0.4 to 1 to -1.0 to 1.0.
The graph for delta L is a little more compressed, so please keep in mind. I did this because the gridlines from the primary Y-axis on the left did not align well with the right's secondary axis (delta L). They are a better match now.
2) I spent some time understanding the variability in the delta L graphs from the prior post. I tracked some of that down, and today's graph in the post benefits from that reduction. The source of variability will be a future post topic, which may benefit the printing and testing of targets on the P900.
Back to CARBON BLACK (and yes, I am having a bit of fun capitalizing and bolding CARBON BLACK - please say it in a deep voice too
)
My post concerns the incremental black/gray level associated with the CARBON BLACK print quality mode (as many infer from the name). CARBON BLACK mode is reported to use the smallest ink droplets when printing (1.5 picoliters). So, it has a much finer droplet resolution and about double the print time. I plan a future post on what buys the user for print details.
I am comparing the two modes outlined in red below for today's post. CARBON BLACK does not allow turning off BEO, so I am comparing it to Max Quality with BEO on.
Again, here is the test target in increments of L=1 from 0 to 99, with the photo paper used for the last test point of 100.
In comparison, there appears to be some increase in black level over most of the L range up to 80. The black level improvement averages about 0.3 delta L.
If you recall from my last post, this follows a similar profile of Delta L. So as far as CARBON BLACK is concerned, it comes across to me as some additional BLACK ENHANCED OVERLAY (or maybe using Gray instead of Light Gray).
If I were a marketing person, I would say "WOOO HOOO" and quote an 11% improvement in Dmax. Epson did say that, and I believe them. That would be the equivalent of going from L = 1.89 to 1.7
I did not test anything related to improved black sheen, glass smoothing, or other qualitative factors, and it probably makes a difference there, too. I am only testing with Ultra Premium Luster, and I can't see a difference at first glance on a test target. Gloss paper may be needed to see that value, and that is outside the scope of my testing.
Hope you find this useful
John Wheeler
Before the details of the experiment, here are a couple of updates.
1) I changed the secondary axis from the prior post from -0.4 to 1 to -1.0 to 1.0.
The graph for delta L is a little more compressed, so please keep in mind. I did this because the gridlines from the primary Y-axis on the left did not align well with the right's secondary axis (delta L). They are a better match now.
2) I spent some time understanding the variability in the delta L graphs from the prior post. I tracked some of that down, and today's graph in the post benefits from that reduction. The source of variability will be a future post topic, which may benefit the printing and testing of targets on the P900.
Back to CARBON BLACK (and yes, I am having a bit of fun capitalizing and bolding CARBON BLACK - please say it in a deep voice too
)My post concerns the incremental black/gray level associated with the CARBON BLACK print quality mode (as many infer from the name). CARBON BLACK mode is reported to use the smallest ink droplets when printing (1.5 picoliters). So, it has a much finer droplet resolution and about double the print time. I plan a future post on what buys the user for print details.
I am comparing the two modes outlined in red below for today's post. CARBON BLACK does not allow turning off BEO, so I am comparing it to Max Quality with BEO on.
Again, here is the test target in increments of L=1 from 0 to 99, with the photo paper used for the last test point of 100.
In comparison, there appears to be some increase in black level over most of the L range up to 80. The black level improvement averages about 0.3 delta L.
If you recall from my last post, this follows a similar profile of Delta L. So as far as CARBON BLACK is concerned, it comes across to me as some additional BLACK ENHANCED OVERLAY (or maybe using Gray instead of Light Gray).
If I were a marketing person, I would say "WOOO HOOO" and quote an 11% improvement in Dmax. Epson did say that, and I believe them. That would be the equivalent of going from L = 1.89 to 1.7
I did not test anything related to improved black sheen, glass smoothing, or other qualitative factors, and it probably makes a difference there, too. I am only testing with Ultra Premium Luster, and I can't see a difference at first glance on a test target. Gloss paper may be needed to see that value, and that is outside the scope of my testing.
Hope you find this useful
John Wheeler
