Re: creating target for litho prints
Re: creating target for litho prints
- Subject: Re: creating target for litho prints
- From: edmund ronald <email@hidden>
- Date: Sun, 17 Jan 2010 11:32:33 +0100
Klaus is our resident list expert on this topic :)
Edmund
On Sun, Jan 17, 2010 at 11:06 AM, Stefan Ohlsson <email@hidden> wrote:
> I'm trying to create a scanner profile for use in a large format scanner.
> They will use it to scan old maps and big litho prints. I have used a Hutch
> chart to make this profile. When I check this profile the result is OK. But
> when we scan the maps they get a magenta cast.
>
> I've checked the scanner light's spectral distribution and it is quite
> spiky. The scanner maker says that they use these fluorescent tubes because
> of the high light output and that we have to slow down the scanner if we
> would change the tubes to those with a more even spectral distribution. As
> my customer will scan thousands of maps, longer scanner times aren't
> acceptable.
>
> I'm thinking of creating a scanner target with colour patches from some
> discarded prints. Any ideas how to do this? How many patches do I have to
> use to create an acceptable scanner profile?
>
> Best
>
> Stefan Ohlsson
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