King George V centenary of stamps 1914-2014.
Jul 30, 2014 1:56:31 GMT -5
Admin Bear, RossTO, and 7 more like this
Post by ozie on Jul 30, 2014 1:56:31 GMT -5
Letterpress is a traditional relief printing process. these stamps where printed using metal-moulded printing blocks on single colour flatbed cylinder press.
Letterpress printing characteristically leaves a slightly heavier edge of ink around the image and the impression can sometimes be seen or felt on the reverse
side of the paper.
Offset lithography is a planographic process that is based on the incompatibility of water and oil-based ink.
Ink is attracted to the image area of the printing plate and is then offset from the plate to a rubber blanket which is in turn transferred to the paper.
Offset lithographic printing gives high-quality print results across a wide variety of paper surfaces and substrates.
.... 