Help! How do I make an invisible line

[ginny-joe]

I have made a coupon magazine 4 per page that will be perforated. When I spoke to the printer they told me to set up a key line so that they would know where to cut because I don't want a visible line on the page. Could someone please help me as I have never done this before.

Printer mentioned that I need to set line to a spot colour (although I'm printing process) and then set it to overprint but I don't really know what this means.

Do I draw a box around coupons, set the stroke to a spot colour and where do I go to set it to overprint and how do I save it to ensure line won't print.

Im using Indesign CS. Also when I'm saving as a pdf do I export it as print or press (it will be printed)

Much thanx for any help:eek:

[CkretAjint]

Yes....

Just draw a box, set the fill to nothing and colorize the stroke with a spot color and give it a custom name like "Perf-DO NOT PRINT". For the overprint it should be listed under "attributes" and be a check box for overprint.

The box won't print for 2 reasons.
1) You are using a spot color for the box. When the printer rips the file for the plates to print, the spot color file will come out as an additional plate, called "Perf-DO NOT PRINT". This tells that this is the perf file and should not print with the CMYK inks.

2) Overprint is turned on for that item. This means that the CMYK inks will print behind the box your drew. And IF the spot color print were to print it would print on top of the cmyk that printed, not knock it out like normal.

So between the custom named extra plate and the over print your printer SHOULD know what the extra plate is for. Make sure they know this when you send the files over, just incase.

[ginny-joe]

Thank you so much, your message was a great help. Much appreciated