Morning, just wondering if any one can enlighten me, my knowledge is only limited using stocastic. We generally run jobs with a 175 line screen, but we recently bought a company that uses a lot of stocastic screens for jobs. Not a problem, I generally understand the difference and how it works but....
Last week I had a moment, and I accidently ran a normal job through the stocastic rip, the reverse of the BC was 50% cyan, dickhead printers and production ran on despite 'having trouble holding open the dot'  :rolleyes:...now my question is, despite my mistake, should a 50% stocastic screen, resemble a traditioal 50% line screen, or will it always look different?

I would say, it would "appear" the same, but since it is a random dot, not really a way to gauge the difference using conventional screen readers. It has to be visual.

Quote from: jack on March 01, 2011, 02:09:59 PMshould a 50% stocastic screen, resemble a traditioal 50% line screen, or will it always look different?

I think the idea is that perceptually they should look the same, but they're visually not the same. Agreed with DCS on this. It's much how the saturation between a 150 linscreen and 200 linescreen will produce different color appearances on the same job, with the same color builds.

taking a guess here, wouldn't 200 line screen be closer to stochastic?
been awhile since I worked with stochastic (and that would've been conventional printing)

Quote from: Tracy on March 01, 2011, 02:43:33 PMtaking a guess here, wouldn't 200 line screen be closer to stochastic?
been awhile since I worked with stochastic (and that would've been conventional printing)

Yep. Actually more.

I was meant to run the job on the 175, just dropped it on the stocastic rip by mistake. Sorry, I should have said, it printed up so the appearance was nearly100% cyan, so looked nothing like what is should have. Wondering if they are meant to look the same 'strength' once on paper, maybe our stocastic rip is not calibrated properly, Kodak didn't want to help us out too much with it.

Yep, sounds exactly like Kodak's MO.

Were you running business cards on a small press?

yep, shino 52

Depending on the micron size of the stochastic, it could look like a 50 line screen if you wanted it to.
Are you running 20 micron or ?
20 is close to a 175 line, 10 micron is close to a 250 line. Depending of course on your output resolution.

I am pretty sure we are running 20

That's why your small press couldn't hold it.

20 micron is the normal or average size.

Stochastic and Conventional screening really won't look the same due to the press gain you get on stochastic, which is a little more than conventional screening.  We usually run a little stronger curve on sto just for that reason.

The round dot of 175 has a lot of paper white showing through, whereas sto covers a little more surface area so you don't get a lot of paper showing through.

And the paper will have an effect on it as well. If it's uncoated, expect a lot more gain than on coated. Some times sto will look "grainy", depending on the screen percentage.

And the press, we run newer Heidelberg presses (XL105s, SM102s) here and have good luck with stochastic, older presses have to be "babied" to get them to print clean.

Quote from: jack on March 01, 2011, 02:09:59 PMMorning, just wondering if any one can enlighten me, my knowledge is only limited using stocastic. We generally run jobs with a 175 line screen, but we recently bought a company that uses a lot of stocastic screens for jobs. Not a problem, I generally understand the difference and how it works but....
Last week I had a moment, and I accidently ran a normal job through the stocastic rip, the reverse of the BC was 50% cyan, dickhead printers and production ran on despite 'having trouble holding open the dot'  :rolleyes: ...now my question is, despite my mistake, should a 50% stocastic screen, resemble a traditioal 50% line screen, or will it always look different?

Sums it up. Had they told you....new plates in 15 minutes, right?   :rolleyes:   

Quote from: frailer on March 01, 2011, 04:13:15 PM

Quote from: jack on March 01, 2011, 02:09:59 PMMorning, just wondering if any one can enlighten me, my knowledge is only limited using stocastic. We generally run jobs with a 175 line screen, but we recently bought a company that uses a lot of stocastic screens for jobs. Not a problem, I generally understand the difference and how it works but....
Last week I had a moment, and I accidently ran a normal job through the stocastic rip, the reverse of the BC was 50% cyan, dickhead printers and production ran on despite 'having trouble holding open the dot'  :rolleyes: ...now my question is, despite my mistake, should a 50% stocastic screen, resemble a traditioal 50% line screen, or will it always look different?

Sums it up. Had they told you....new plates in 15 minutes, right?   :rolleyes:

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