RE: [OT] Dot shape prevalence
RE: [OT] Dot shape prevalence
- Subject: RE: [OT] Dot shape prevalence
- From: "Richard Corbett" <email@hidden>
- Date: Fri, 7 Oct 2005 00:20:56 +0100
-----Original Message-----
From: colorsync-users-bounces+richard=email@hidden
[mailto:colorsync-users-bounces+richard=email@hidden]
On Behalf Of Abe Hayhurst
Sent: Thursday, October 06, 2005 8:43 PM
To: email@hidden
Subject: RE:[OT] Dot shape prevalence
The reason behind placing magenta at 45 degrees is so that you have 45
degrees between the angle of the yellow and the angle of the magenta
(with yellow normally being at zero degrees). The problem with black at
a non-45 degree angle is that you can see saw-tooth. I want the best of
both worlds, so I use a screen/angle set that puts cyan at 15 degrees,
magenta at 75 degrees, yellow at 30 degrees, and black at 45 degrees. So
I get 45 degrees between magenta and yellow and keep black at 45
degrees.
You must be talking about image setters because on drum scanner output many
trade scanning houses produced their magenta at 45 degrees because this is
the least angle noticeable to the eye. There should not be any saw tooth on
a black at either 75 or 15 degrees and as the black is the lightest lay down
of colour - under normal circumstances - many printers in the UK used to ask
for those angles.
The angle of the yellow is almost immaterial as the eye cannot see the
colour as dots anyway and, at least in my experience, it never caused any
screen clash with any other colour.
Richard
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