A presentation delivered at the ICT LAB1 Ahantaman Girls' Senior High School, Sekondi - Ghana

1. OFF-SET LITHOGRAPHY
PRESENTATION BY:
IMPRAIM – SWANZY ENOCK
Graphic Design Tutor @ Ahantaman Girls’ Senior High Sch.
Email: eimpraimswanzy@yahoo.com

2. Meaning
 Litho means stone and Graphy means writing or drawing
 Off-set – is a printing process using ink transfer
 It is a method of printing in which inked impressions are transferred onto paper
from another surface
 Lithograph is a picture printed using a stone or metal block on which an
image has been drawn with thick oily substance that attract ink

3. Off – set Lithography
 Is a method of making prints from a flat surface usually a stone or
metal plate
 In off-set lithography, the printing surface (substrate) and non-printing
surface are on the same level
 Lithography is based on the fact that grease and water do not mix

4. GREASE
WATER

5.  A German printer called Alois
Senefelder in 1796 discovered this
principle.
 1771 1834

6. Making a lithographic print
 To make a lithographic print, the
artist first draw the image on the
stone with grease based
lithographic crayon.
 The stone is treated with a light
acidic bath to fix the image and
soaked in water.
 The water is absorbed by the
stone only in the areas not
coated with grease and
repelled by water soaked
background areas.

7. • Paper is placed on the stone and the pressed gently with the
roller for the image to be transferred onto the paper.
• Remove paper after the image is transferred.
• Allow it to dry.

8. Off-set lithographic machine (printer)

9.  The off-set lithographic machine
operate in five systems
1. Feeding system
2. Dampening system
3. Inking system
4. Printing/impression system
5. Delivery system

11. The Printing press
 We have three major procedures. These are:
PRE – PRESS
DESIGNING
FILMING
PLATING
PRESS
PRINTING
POST - PRESS
PRINT FINISHING
COLLATING
BINDING/STITCHING
GLUEING
TRIMMING

12. Equipments at the press
PAPER CUTTING MACHINE IMAGE SETTER

13. PLATE MAKER
OFF-SET PRINTING MACHINE

14. STITCHING MACHINE LASER JET PRINTING

15. SCANNER

16. THANK YOU