I hate my black screen angle...

[TheProcessIStheproduct]

Running a 210 lpi square dot out of trueflow, I have tried different shapes but they don't look great, so I like this screen set but black type looks very steppy because of the angle it is set to. I swap it sometimes with Cyan on certain jobs, but wondering what people are running angles at? And what is down side of permanently change it?

[DCurry]

My angles are as follows:

C: 15
M: 75
Y: 0
K: 45

This keeps the screened black edges nice and clean. Haven't had any downside. I also make sure that for spot colors I also use the 45 angle for the same reason. (just be sure to watch out for any duotones that might have the PMS and the K on the same angle).

[BeauchampT]

We have good success with the following angles (measure from cross machine direction):

C: 105
M: 135
Y: 90
K: 45

[Luc St-Pierre]

Your angles and those of Dan Curry are the same . . . Only one quadrant of the circle counts so 0=90, 15=105, 75=135 etc. 45 degree is the most commonly used angle for K in offset.

[gordo]

Your angles and those of Dan Curry are the same . . . Only one quadrant of the circle counts so 0=90, 15=105, 75=135 etc. 45 degree is the most commonly used angle for K in offset.

Luc, you're correct that only one quadrant of the circle counts, however, if my math is correct (really not my strong point) 135°=45° not 75° (0+90=90, 15+90=105, 45+90=135)

Which means that BeauchampT is running Magenta and Black at the same angles - not a good way to print.

DCurry is running the classic N American screen angle set.

@ TheProcessIStheproduct - what do you mean by "square dot"?

BTW, this is what a Square dot looks like:


best, gordo

[Ddog]

I'm using 240lpi with the attached screen angles. This is with Prinergy 5.1.

[gordo]

I'm using 240lpi with the attached screen angles. This is with Prinergy 5.1.

You're running you screen angles at:

K: 45
C: 75 (165° is the same angle as 75°)
M: 15 (105° is the same angle as 15°)
Y: 0

So you've effectively swapped your C and M angles.

You eliminate moiré in pastel greens but run the risk of moiré in pastel oranges (skin colors)

best, gordo

[TheProcessIStheproduct]

it is a screen set called:
TF1-724SQU01H-12
It is kind of a squared off round dot, NOT like the picture Gordo posted. But maybe the square feature of the dot does not like the 45 angle, which I assume is what it is set to but I cannot find a number for the angle, says screen angle: and you can toggle between C,M,Y,K? Anyone know Trueflow better then me?

[gordo]

it is a screen set called:
TF1-724SQU01H-12
It is kind of a squared off round dot, NOT like the picture Gordo posted. But maybe the square feature of the dot does not like the 45 angle, which I assume is what it is set to but I cannot find a number for the angle, says screen angle: and you can toggle between C,M,Y,K? Anyone know Trueflow better then me?

It's pretty lame. Screen makes a big deal out of their "extensive screening library" but the only info on their web site about their screening is:

"Conventional

Conventional
Overview
Product Overview (Conventional)

Screen offers a number of options for conventional screening."
(here's the link: SCREEN (USA) - Products - Conventional )

:-(

best, gordo

[ansoft]

Great Respect to Gordo, but
Screen Dainippon offer really a great number of types of dot shapes, but the angles are constraint to C 15, M 45, Y 90/0, K 75. This is by default. In most practical cases these angles are Ok. There is some strange Japanese logic for this setting.
TF1-724SQU01H-12 means Trueflow1, 2400 dpi Square dot, High lpi, 12 bit coding, but the 7 means that all screen angles are +7.5deg for flexo. This can be the reason for strange looking.

Best Regards,
Ansoft