Printing

Question 1

What are the colours used and order

Answer 1

CMYK

Cyan magenta yellow black

Question 2

What happens in pre press

Answer 2

Art is checked, typeface, colours images quality
Colours separated using software into cmyk
Print quality chosen, dpi of printed image

Question 3

What are the main quality controls

Answer 3

Crop marks
Registration marks
Colour bars

Question 4

What are crop marks

Answer 4

Marks showing where the paper will be trimmed, image is printed over the lines in a bleed area to allow for tolerance so there are no little white edges when the paper is cut

Question 5

What re colour bars for

Answer 5

Prints all the different colours to make sure the ink mixture for them is perfect. They are checked using a densitometer which makes sure the colours are perfect.

Question 6

What are registration marks

Answer 6

Marks that are used to make sure all the printing colours align perfect. It should appear bold and not blurry and the colour of the last ink used.

Question 7

What happens in finishing stage

Answer 7

Print is guillotined and finishes such as embossing are added

Question 8

What is photomechanical transfer in offset lithography

Answer 8

They are thin aluminium and he colours of the image are separated into cmyk and printed out. These are placed onto the aluminium plates and UV light is shone through them. The plats have a special green coating that reacts to the UV. This means ink only sticks to the part of the plate where UV has hit it.

Question 9

Why are lithography plates aluminium

Answer 9

They are flexible and can last up to 30,000 prints

Question 10

How is offset lithography done

Answer 10

Aluminium plates put onto machine. Rollers apply slightly watered ink to the aluminium plates. Plates rolle over paper fed into machine and transfer ink