Paper and Board Finishing Flashcards
Why are finishes used? (2)
enhance appearance
provide protection for the material
Describe lamination via encapsulation
desktop laminator and the sheet of paper is encapsulated by a polymer pouch or film roll
Describe lamination via surface coating
liquid lamination (for signage) or film lamination (menu cards)
Describe embossing
creates a raised design on the surface of the paper or card to give a visual and tactile effect (greetings cards)
Describe debossing
produces an imprinted depression that sits below the surface of the paper or card
What is varnishing?
clear, non pigmented ink used on pre-coated papers and boards to enhance the colour as well as offer some protection against dirt, fingerprints and water
Describe UV varnishing
provides smooth finish , usually high gloss or matt and abrasion and chemical resistant
applied to sheet via set of rollers the passed under a UV light to cure
Describe Spot varnishing
applied in specific areas or spots rather than to the whole surface area
Describe foil blocking
heat and pressure applied to a metallic paper (foil) to create areas of depth and texture to add aesthetic impact
What is meant by the term substrate
the material on to which the print ink is applied
True or false : screen printing cannot be carried out in a workshop with high set up costs due to the use of basic screens and printing inks
FALSE - can be carried out in a workshop with minimal set up costs
Describe screen printing
screen has open areas for the ink to pass through
a different screen is required for each colour
quite a slow process with reasonably high cost per producs
What products is screen printing often used for?
small print run items such as posters, display boards and textile T-shirts
What 4 colours does flexography, offset lithography and digital printing use?
cyan, magenta, yellow and key (black)
How is the print colour required created?
four colours printed on top of one another in various quantities on to the substrate surface
What is simplest and least expensive printing process?
Flexogrpahic printing due to fast-drying water-based inks
What products is flexographic printing used for?
newspapers, comics, labels, carrier bags and continuous pattern products such as gift wrap
Give 3 advantages of flexographic printing
high print speed
low maintenance
prints on wide variety of substrate materials
Give 3 disadvantages of flexographic printing
cost of printing plates is relatively high but last for millions of print runs
large amount of substrate to set up the job
time consuming to alter
What is offset lithography used for?
printing medium and long print runs of products such as books, posters and packaging
In what ways is offset lithography versatile?
can produce one colour (single roller), five colours (CYMK) and a ten - feature machine (ten roller machine)
Give 3 advantages to offset lithographic printing
consistently high image quality
long life of printing plates because they only come into contact with the printing blanket (less abrasive)
quick and easy production of printing plates
Give one disadvantage of offset lithographic printing
expensive set up and running costs for small quantities
Why is digital printing widely utilised?
speed and efficiency
