Characteristic Curve

[Askerbhad]

Hi Everyone,

Does anyone know what a Characteristic Curve is on CtP plates?

How does it happen?

Can it be prevented?

Kind Regards

 

[gordo]

Hi Everyone,

Does anyone know what a Characteristic Curve is on CtP plates?

How does it happen?

Can it be prevented?

Kind Regards

Usually this means the non-linear tone curve of the plate after calibration (laser intensity and processing set up). Different plate brands have different characteristic curves once they are calibrated.
It is not prevented since it does not matter. The important thing is that the CtP device images in a consistent manner. That allows a tone reproduction curve to be applied so that you achieve your desired tone values in your presswork.

Best, gordo

 

[gordo]

What is up with the Sales plug on every post lately...!!!???

Where is the sales plug?

 

[inky]

Curves

Curves

I wondered for the less experienced printers, are there any standard curves I could copy for my polyester computer to plate?

Our ink rep tweaked our machine based on a sample curve in the manual & the difference was amazing. This was for coated paper and I print mainly on uncoated though.

Thanks in anticipation.

Lukew your mailbox is full! if you read this.

 

[TUFF Stough]

I wondered for the less experienced printers, are there any standard curves I could copy for my polyester computer to plate?

Our ink rep tweaked our machine based on a sample curve in the manual & the difference was amazing. This was for coated paper and I print mainly on uncoated though.

Thanks in anticipation.

Lukew your mailbox is full! if you read this.

What you need is the print curve, not plate curve. Plate curve is normally set to be linear, while print curve is mostly based on ISO 12647-2. CMIIW.

 

[inky]

What you need is the print curve, not plate curve. Plate curve is normally set to be linear, while print curve is mostly based on ISO 12647-2. CMIIW.

I see! are there standard plate curves readily available, to get me going in the right direction? I have had a Google to no avail.

Thanks

 

[gordo]

I see! are there standard plate curves readily available, to get me going in the right direction? I have had a Google to no avail.

Thanks

You could start by making your plates linear. But that may be a waste of time if that doesn't achieve the press tone reproduction you want. Or you could do it properly. That's explained here: The Print Guide: The principle of dot gain compensation plate curves

Best gordo

 

[compdispo]

How can less in the output text and pictures or not an error it?

-----------------------
r404a | hair extension | ny seo

 

[danremaley]

Plate curves

Plate curves

I see! are there standard plate curves readily available, to get me going in the right direction? I have had a Google to no avail.

Thanks

"google Me", there are several articles I have written. E-mail me and I'll send you the tone values for the press and densities for a beautiful uncoated sheet.
Dan Remaley (former GATF)
[email protected]

 

[danremaley]

plate curves

plate curves

I wondered for the less experienced printers, are there any standard curves I could copy for my polyester computer to plate?

Our ink rep tweaked our machine based on a sample curve in the manual & the difference was amazing. This was for coated paper and I print mainly on uncoated though.

Thanks in anticipation.

Lukew your mailbox is full! if you read this.

Please email me and I can give you the "wanted" numbers for an uncoated and coated press sheet. You will need to run a linear plate at correct density and measure the dot area of the tone scale. The RIP will have a "measured" file an a "wanted" file, the RIP calculates the difference and makes a plate value curve.
Dan Remaley (former GATF)