Graphic Design & Printing TechnologyThermography
Thermography is a process of producing raised printing through the application
of powder and heat.
Several steps are required to produce thermographic effect. First a fine resin
powder is springled on a freshly printed sheet. Second, the exess powder is
removed from the non inked area. Third the powder remaining on the wet
image area is heated. The heat melts the powder and creates a raised effect
when the powder cools. Clear powders allow the colour of the base ink to
show through, whereas opaque powder colours have complete hiding power.
Thermography can be used on illustrations, halftones and type. Type smaller
than six point in size and letters with delicate serifs should be avoided because
they both tend to fill in.
Binding
Pamphlet binding : Most of today’s magazines, catalogues, and booklets fall
into the pamphlet binding category. One of the simplest techniques is saddle
wire stitching. Sheets are folded, gathered, and stitched through the centre, or
saddle, of the folded sheets.
Many booklets and magazines are fastened by this method. The folded sheets
are placed one over the other and then placed on the saddle of the stitcher. The
maximum number of pages is regulated by the limit of the stitcher and/or
pamphlet thickness allowing the booklet or magazine to lie flat.
When larger publications are bound, the machine is capable of gathering the
signatures and cover. They are then stitched and trimmed.
Edition binding : Also called case
binding, is considered the most
durable and permanent method of
binding books that will be used
extensively over a period of time,
such as text books and reference
books. The parts of an edition-bound
book are backing paper, lining, head
band, supercloth (mull), sewn
signatures, book body, end sheets,
cords, book cover, and binders board.
The binding process involves
gathering and sewing the signatures
together, then compressing the
signatures, and trimming the edges.