These plates are engraved almost entirely by photo-chemical means, thus
avoiding the old, slow and tedious method of engraving on wooden blocks,
where the workman is compelled to engrave each line separately by
cutting away the wood around it, often spending many days upon a plate
a few inches square.
In appearance our relief plates are the same as regular stereotypes,
being mounted type high on blocks ready to be set up and printed from,
with type, on any ordinary press.
They can be used directly and will wear as long as any type-metal
plates, but if a great number of impressions are wanted, duplicate