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 Positive or Negative?

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ARC



Number of posts : 49
Location : Manila
Member since : 2010-11-24

PostSubject: Positive or Negative?   Tue Jan 24, 2012 3:58 pm

Dear Sirs,

I am just wondering why most CTP installations use Positive working plates rather than Negative working?

Is there any advantage using such?

ARC
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billy

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Location : makati
Member since : 2007-07-24

PostSubject: Re: Positive or Negative?   Wed Jan 25, 2012 5:12 pm

ARC wrote:
Dear Sirs,

I am just wondering why most CTP installations use Positive working plates rather than Negative working?

Is there any advantage using such?

ARC


Cheaper but low mileage. ours is negative acting plate high mileage.
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ARC



Number of posts : 49
Location : Manila
Member since : 2010-11-24

PostSubject: Re: Positive or Negative?   Thu Jan 26, 2012 11:31 am

billy wrote:
ARC wrote:
Dear Sirs,

I am just wondering why most CTP installations use Positive working plates rather than Negative working?

Is there any advantage using such?

ARC


Cheaper but low mileage. ours is negative acting plate high mileage.

What mileage are we talking about here?
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Sandman

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Location : Middle East
Member since : 2007-11-21

PostSubject: Re: Positive or Negative?   Thu Jan 26, 2012 5:20 pm

Wala masyadong difference ang positive over negative working plates. Of course meron advantages and disadvantages ang bawat isa. Pero hindi significant. Dito sa amin madami akong nabisita na negative working.
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billy

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PostSubject: Re: Positive or Negative?   Thu Jan 26, 2012 8:23 pm

ARC wrote:
billy wrote:
ARC wrote:
Dear Sirs,

I am just wondering why most CTP installations use Positive working plates rather than Negative working?

Is there any advantage using such?

ARC


Cheaper but low mileage. ours is negative acting plate high mileage.

What mileage are we talking about here?

Run length ng plates.

Dalawang klase ang thermo plates dito sa Pilipinas ang pagkakaalam ko.
single layer that is the positive, good for 30k impressions.
the Dual layer that is the negative, 100 up ang impression.

Violet CTP is dual coated layer only and it is a negative acting plate.
The single layer thermo plate is much cheaper than the dual layer, maybe around Php 60 per plate ( need to verify the price).
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ARC



Number of posts : 49
Location : Manila
Member since : 2010-11-24

PostSubject: Re: Positive or Negative?   Fri Jan 27, 2012 8:59 am

billy wrote:
ARC wrote:
billy wrote:
ARC wrote:
Dear Sirs,

I am just wondering why most CTP installations use Positive working plates rather than Negative working?

Is there any advantage using such?

ARC


Cheaper but low mileage. ours is negative acting plate high mileage.

What mileage are we talking about here?

Run length ng plates.

Dalawang klase ang thermo plates dito sa Pilipinas ang pagkakaalam ko.
single layer that is the positive, good for 30k impressions.
the Dual layer that is the negative, 100 up ang impression.

Violet CTP is dual coated layer only and it is a negative acting plate.
The single layer thermo plate is much cheaper than the dual layer, maybe around Php 60 per plate ( need to verify the price).


So we are talking about the mileage advantage only of Negative working over positive working? Is there no other advantages of negative plates and vise versa?

Salamat!
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Sandman

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PostSubject: Re: Positive or Negative?   Sat Jan 28, 2012 2:12 am

Silver plates kami, positive. Run length more than 100K.
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ARC



Number of posts : 49
Location : Manila
Member since : 2010-11-24

PostSubject: Re: Positive or Negative?   Mon Jan 30, 2012 10:33 am

What is the advantage then?
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billy

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PostSubject: Re: Positive or Negative?   Mon Jan 30, 2012 4:16 pm

ARC wrote:
What is the advantage then?

NEG ACTING PLATE, you only expose what is needed, the laser will not go through the whole plate especially when the image is lot smaller than the plate. which translate to SPEED and you will be benifited with better productivity and TIME SAVING.

FOR LASER LIFE:
FOR VIOLET: Since you only expose what is needed, it EXTENDS the laser life.
FOR THERMO: NO benifit since the laser is already ON upon turning ON the CTP

That translate COST SAVINGS, how much is a LASER TODAY?
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