screen printing > 4 Color and Simulated Process Printing
halftone measurment results. WOW, dot gain galore!
Command-Z:
My brain just exploded.
ftembroidery:
--- Quote from: Command-Z on May 05, 2011, 02:44:18 PM ---My brain just exploded.
--- End quote ---
The only reason mine didn't is because the holes in my head let off the excess pressure......but you should have heard the WHISTLING sound that was emanating from me.
Edited because of a spelling error
yorkie:
--- Quote from: blue moon on May 05, 2011, 12:04:47 PM ---I guess I answered my next question in my head as I type. Should I correct and suffer low ink coverage? I am thinking, yes, and then adjust up as needed. Better to know and adjust than eyeball . . .
--- End quote ---
Your prints look good, don't mess that up just to make a machine read some number. The fact that the 95% is 95% and not 100%, tells me that something is controlling the press gain. My question is to what extent you understand what is actually happening? If you print process, do you get similar numbers? When you underbase in white, do you get similar numbers.
The most simple of tests is a graduated screen, which runs from 0% to 100%. Where in the halftone does it first leave a mark and how far up can you still see a halftone? Different inks have different characteristics.
blue moon:
--- Quote from: yorkie on May 05, 2011, 05:03:17 PM ---
--- Quote from: blue moon on May 05, 2011, 12:04:47 PM ---I guess I answered my next question in my head as I type. Should I correct and suffer low ink coverage? I am thinking, yes, and then adjust up as needed. Better to know and adjust than eyeball . . .
--- End quote ---
Your prints look good, don't mess that up just to make a machine read some number. The fact that the 95% is 95% and not 100%, tells me that something is controlling the press gain. My question is to what extent you understand what is actually happening? If you print process, do you get similar numbers? When you underbase in white, do you get similar numbers.
The most simple of tests is a graduated screen, which runs from 0% to 100%. Where in the halftone does it first leave a mark and how far up can you still see a halftone? Different inks have different characteristics.
--- End quote ---
Oh, yes, there is plenty more for me to learn and test. This was just a quick test on a tired old static 305. I used a plain 70 duro squeegee (normally use 80 or triples for stuff like this). no idea what will happen when I test the other ink types.
THe RIP actually has a built in curve for the top percentages, thus the 95 reads 95. THe 100 was not as black as I'd like it to be. The screen was completely open, but the coverage was not as good as I'd like it to be. So as I said, this was just a quick test and the results were very surprising.
My thinking is . . . If I get the 50 to print as 50, I can then adjust the curve back to where it needs to be to get the brighter colors or better coverage. This way I would know what is going on exactly and the results would not be a surprise.
pierre
Chadwick:
You folks kill me.
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