"He who marches out of step hears another drum." ~ Ken Kesey
Quote from: Dottonedan on June 01, 2015, 04:46:05 PMQuote from: blue moon on June 01, 2015, 11:05:54 AMWe've successfully held the calibrated 4-5% dot at 55lpi on 330S mesh on the Vastex unit. Same thing with 3140 was holding 3%. BUT . . . . the exposure system was dialed in for the 3140 so changes in the RIP can be made to compensate for it. I am certain that with proper tools LED unit will expose 3%.For anybody trying to see the calibrated 2% dot on a 305, it is not going to happen with ANY unit!!! As I understand, the physical limitation of the mesh is 3%. At that point the dots become too small to hold on. It would be possible to calculate the dot size and compare it to the opening size, but I'll take the expert's word on it. Anybody printing a 2% at 55lpi on a 305 and holding it is either not calibrated, on the wrong mesh or wrong lpi.pierreIt's all relative to your specific device and setups. I'd guess that 90-95% of the industry produces printed apparel without a densitometer calibrated halftone LPI because of the cost to get one and the fact that they have been selling printed apparel without one for years. That doesn't mean what they print for halftone dots is truly correct, just well enough apparently.Also, note that even with a densitometer, those calibrate (tone) accuracy and not size of dot accuracy. For example, an accurate calibrated 2% tone can still have a huge dot such as in a 20lpi. One mans 2% in a 55lpi is not the same as another. There will be people who can hold a 2% dot in a 55lpi on a 305 mesh (with their device). Of those, their dot is larger or closer to a 3% in another device.QuoteFrom P,the 20lpi was never part of this conversation!If you take a look, you'll see that I SPECIFIED 55lpi and 2%. This creates a dot that has to be very specific in size and can be recreated anywhere in the world, by any piece of equipment and if it is 2% and 55lpi it will ALWAYS look the same!(if it is compared to another 2% 55lpi that has also been calibrated, yes it should look the same). Also, even yours, Your 2% 55lpi is not going to looks the exact same size as a 2400 dpi wet film processing imagesetter. Close, but not exact.
Quote from: blue moon on June 01, 2015, 11:05:54 AMWe've successfully held the calibrated 4-5% dot at 55lpi on 330S mesh on the Vastex unit. Same thing with 3140 was holding 3%. BUT . . . . the exposure system was dialed in for the 3140 so changes in the RIP can be made to compensate for it. I am certain that with proper tools LED unit will expose 3%.For anybody trying to see the calibrated 2% dot on a 305, it is not going to happen with ANY unit!!! As I understand, the physical limitation of the mesh is 3%. At that point the dots become too small to hold on. It would be possible to calculate the dot size and compare it to the opening size, but I'll take the expert's word on it. Anybody printing a 2% at 55lpi on a 305 and holding it is either not calibrated, on the wrong mesh or wrong lpi.pierreIt's all relative to your specific device and setups. I'd guess that 90-95% of the industry produces printed apparel without a densitometer calibrated halftone LPI because of the cost to get one and the fact that they have been selling printed apparel without one for years. That doesn't mean what they print for halftone dots is truly correct, just well enough apparently.Also, note that even with a densitometer, those calibrate (tone) accuracy and not size of dot accuracy. For example, an accurate calibrated 2% tone can still have a huge dot such as in a 20lpi. One mans 2% in a 55lpi is not the same as another. There will be people who can hold a 2% dot in a 55lpi on a 305 mesh (with their device). Of those, their dot is larger or closer to a 3% in another device.
We've successfully held the calibrated 4-5% dot at 55lpi on 330S mesh on the Vastex unit. Same thing with 3140 was holding 3%. BUT . . . . the exposure system was dialed in for the 3140 so changes in the RIP can be made to compensate for it. I am certain that with proper tools LED unit will expose 3%.For anybody trying to see the calibrated 2% dot on a 305, it is not going to happen with ANY unit!!! As I understand, the physical limitation of the mesh is 3%. At that point the dots become too small to hold on. It would be possible to calculate the dot size and compare it to the opening size, but I'll take the expert's word on it. Anybody printing a 2% at 55lpi on a 305 and holding it is either not calibrated, on the wrong mesh or wrong lpi.pierre
From P,the 20lpi was never part of this conversation!If you take a look, you'll see that I SPECIFIED 55lpi and 2%. This creates a dot that has to be very specific in size and can be recreated anywhere in the world, by any piece of equipment and if it is 2% and 55lpi it will ALWAYS look the same!
Some ppl have a 2% dot in their art file, but when they actually develop the screens, it's 7%! They just held a 7% dot, not a 2% dot. Well, that seems a bit extreme but ok. Could be.[/size]
BUT as soon as you start saying that you can hold a 2% dot at 55lpi, that means only one thing.[/size]
Also, holding a dot means (at least in my book based on what I was told) all the dots in that range have opened or cleared. By that definition, it is not possible to hold a 2% dot on the 305 as it is thinner then the mesh and will be lost when it lands on it.pierre[/size]
Sorry.. couldn't resist.