Stamp Printing
In addition to the line-engraved postage stamps we have described at length, a great many
postage stamps of the world have been printed by more ordinary processes. All forms of
printing have...
A great many postage stamps of the world have been produced by lithography and some stamps
have been produced in the same design by both lithography and steel engraving. Many
lithographed...
Because some stamps have been printed by two or more methods and because specialists often
collect various kinds of printing flaws, the entire subject of printing is of interest to
all collectors. In fact...
Perkins did not invent line engraving. He invented a process of transferring a steel
engraving to another piece of metal. This process plays such an important part in
philately that...
Still again, instead of trying to re-enter the design with the transfer roll, "recutting"
would be resorted to. In this case the engraver would recut by hand the lines that were
not properly...
Embossing, the method used to produce all Government stamped envelopes of the United
States and several other countries, is basically letterpress printing. It differs only in
that the uninked...
This is a variation of the lithograph process in which the design is transferred from the
printing roller to a rubber roller and then, "offset" to the paper. It is a particularly
rapid process and one...
These are methods of intaglio printing widely used in commercial printing (and by various
other names), as for the Sunday pictorial supplement of newspapers. It is true intaglio
printing in that...
Prior to the actual laying down of the designs from the transfer roll as described
earlier, the steel printing plate must be prepared. Everything that is done to this plate
will show up on...
The finished steel plate, ready for the printer, presents a perfectly smooth, highly
polished surface (sometimes chromium-plated) in which the lines to be printed are
recessed. To ink this plate...
We have indicated the difficulty of registering colors in multicolor printing from line
engraved plates. All we have stated on this matter was true and continued to be true for
all United States...