Re: CTP - reduced dot
Re: CTP - reduced dot
- Subject: Re: CTP - reduced dot
- From: Jon Crook <email@hidden>
- Date: Wed, 08 Mar 2006 11:35:40 -0600
- Thread-topic: CTP - reduced dot
That is pretty good! What kind of presses are you running? Are your readings
similar from unit to unit? We noticed quite a bit of difference from going
from 175lpi to 250lpi although this was easy to compensate for.
On 3/8/06 11:03 AM, "Bret Hesler" <email@hidden> wrote:
> Yes. We did one of the runs for the GRACoL committee at 175LS with linear
> plates, and had around 1% move at the midtone to get the GRACoL tone curve.
> We recently put in a new press and ran the test at 200LS and got almost
> exactly the same results. Our inks matched the solid LAB values from ISO
> 12647-2.
>
> Bret Hesler
> L.P. Thebault Company
>
>
> On 3/8/06 10:59 AM, "Jon Crook" <email@hidden> wrote:
>
>> Are you able to achieve gray balance and still get GRACoL 7 lab values for
>> CMYK while getting a plate curve that is close to linear?
>>
>>
>> On 3/8/06 9:20 AM, "Bret Hesler" <email@hidden> wrote:
>>
>>> Our inks are relatively low in Tack. It reduces the problems with picking,
>>> and allows us to get relatively close to legacy midtone gain values with
>>> plates that are close to linear.
>>>
>>> Bret Hesler
>>> L.P. Thebault Company
>>>
>>>
>>> On 3/8/06 9:11 AM, "Jon Crook" <email@hidden> wrote:
>>>
>>>> We are also running to GRACoL 7 but what you run to depends on what your
>>>> intentions are. If you want to match legacy work then you would want to
>>>> achieve the lab values, densities, and the appropriate dot gain as to what
>>>> you where running before you went CTP. I have found that GRACol 7 is much
>>>> easier to maintain than our legacy specs so any reprints that come through
>>>> get a new proof for approval. In my experience, linear plates seem to look
>>>> pretty flat on press
>>>>
>>>>
>>>> On 3/8/06 7:16 AM, "Bret Hesler" <email@hidden> wrote:
>>>>
>>>>> We run curved plates to match the GRACoL 7 tone curve. When we switched to
>>>>> digital halftone proofing and CTP, our legacy standard was Analog
>>>>> waterproof. Three years ago, we lowered the dot gain targets to match the
>>>>> GRACoL 6 spec, around 20%. Now with the GRACoL 7 targets, our plates are
>>>>> near linear, and dot gains are in the mid to high teens.
>>>>>
>>>
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--
Jonathan Crook
Prepress Technician
Corporate Image
www.corp-image.com
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