Copperplate engraving

“ A screw is attached to the apparatus, so that if the medal be raised a very small quantity by the screw, the copperplate will be advanced by the same quantity, and thus a new line of section may be drawn: and, by continuing this process, the series of sectional lines on the copper produces the representation of the medal on a plane: the outline and the form of the figure arising from the sinuosities of the lines, and from their greater or less proximity. The effect of this kind of engraving is very striking; and in some specimens gives a high degree of apparent relief. ”

“ Instead of offering a flat, smooth surface, like the plates in line engraving, a mezzotint copper must be first grained by a steel tool (called the "rocker") , shaped like a chisel, with a semicircular blade which is bevelled and toothed. Sometimes (and this is generally the case in the present day) the "rocking" of the surface, on which the engraver is to work, is produced, not by a tool, but by a special machine. ”

“ A new element is introduced, valued for some particular facility or effect, and it is often adopted without considering how—like a new element in a chemical combination—it alters the relations all round.
Copper-plate engraving was presumably adopted as a method for book-illustration for its greater fineness and precision of line, and its greater command of complexity in detail and chiaroscuro, for its purely pictorial qualities, in short, and its adoption corresponded to the period of the ascendancy of the painter above other kind of artists. ”

“ Until the early part of the present century copper was practically the only metal used for engraving. Only a limited number of impressions can be taken from a copper plate because it wears rapidly, and it is not suited to such work as the production of postage stamps. About 1830 the way was found to make steel of sufficient softness and fineness of grain to be available for engraving. To-day annealed steel is almost exclusively used for this purpose. Annealed steel is steel which has been soft 26ened without being decarbonized. ”

“ As compared with copper engravings, steel gives a somewhat harder line, whilst copper gives a soft line, but this, of course, does not mean that steel engravings are harsh; the finest work can be done on steel and of remarkable delicacy.
At the present day line engraving is seldom or never used as a means of illustrating scientific work. It is obvious that the average scientist has not the time and he certainly does not possess the skill to make his own plates; the engraver must translate the originals into lines, so that much consultation would be necessary. ”

“ COPPER-PLATE PRINTING.
Copper, or Steel-plate Engravings, are Printed by a different process. The Copper, or Steel-plate Press, is formed of two Rollers, one placed over the other, with only a sufficient space between to allow a board to pass, when a strong force is applied. The Plate is then laid on a small fire adapted to the purpose, so as to heat it sufficiently to liquify the Ink, and cause it to diffuse itself over every part of the Engraving. ”

“ As to copper-printing: in the future, as lithography extends, there probably will remain an advantage with the copper in the case of only two styles, the engraving done with the engraving needle, and the etching, the latter being worked up with the graver and the cold needle. In this respect, however, the skill of the artist must be taken into account, for a good man can produce better work on stone, even in those two styles, than a less skillful man can produce on copper. ”

“ What we want is to get nearest to the artist himself with the least amount of interpretation or intermediation on the part of the engraver. Is engraving on copper to be reproduced, we want a facsimile if possible, and not a rendering into something which is supposed to be the orthodox utterance of wood-engraving. ”

“ They resist the most powerful press better than do stone, copper, and even iron plates. Their inner elasticity supports the most extreme pressure without alteration if only they are handled properly. (5) The application of fatty inks, and also engraving with the steel graver is easier. Indeed, because of the great toughness of the stone-paper, the engraving process approaches copper engraving more closely. (6) Inking and printing are easier, and demand no such powerful pressure, because the artificial stone receives and imparts [92] color more readily, than does the natural stone. ”

“ There can be little doubt that means will be discovered of thus producing perfect facsimiles of artists' drawings; so that, if no more than facsimile be required, the old art of cutting furrows in metal may be considered as, at this day, virtually ended. And, indeed, it is said that line engravers cannot any more get apprentices, and that a pure steel or copper plate is not likely to be again produced, when once the old living masters of the bright field shall have been all laid in their earth-furrows. ”

“ The subtle continuity of thought, from the first conception to the finished plate, which we prize in original engraving, is necessarily destroyed in such collaboration, but the engraver, working exclusively on the copper plate, is able infinitely to vary and develop the resources of the process by dint of practice. ”

“ After the introduction of steel for engraving purposes about the year 1823, Cousins and his contemporaries were compelled to work on it, because the soft copper previously used for mezzotint plates did not yield a sufficient number of fine impressions to enable the method to compete commercially against line engraving, from which much larger editions were obtainable. ”

“ It is, in fact, rapidly gaining the preference over metallic engraving; the great expense and very inferior durability of copper, and the coldness, hardness, and absence of richness which seem to be inherent to steel, having gone far to banish both from general use as ornaments or additions to printed books. ”

“ The extreme minuteness and delicacy of the electrotype process is strikingly exemplified in its application to the transference of engraved copper-plates. A highly finished engraved copper-plate has a film of metal deposited over its whole surface, which, when detached, exhibits all the lines that are cut into the copper-plate in relief. That electrotype cast then serves as the mould for further depositions, in which every line in the original engraving is so perfectly developed, that it is impossible to detect a difference in the impressions taken from the two plates. ”

“ It more frequently happens that a copper plate is coated with steel before being submitted to the action of the press, in order to preserve it, and to increase the number of copies without taking off the edge of the workmanship. That is to say, that by means of "electrotyping" a thin coat of metal is superimposed, which, since it considerably increases the power of endurance, increases the productiveness of the plate and the number of proofs that can be taken. ”

“ The illustrations are hand-coloured copper engravings by Sowerby and others, many of which, particularly the earlier ones, are of outstanding excellence. The engraving is often nothing more than the mere outline of the plant, whilst in cases where the structures are more massive, a certain amount of shading is used. ”

“ The last and most complete state of engraving upon copper, comes next under our notice. For this improvement, it appears to me, we are as much indebted to Germany as for the art of printing books. The press there first discovered for typography, opened the way for that applied to copper plates. The mechanical construction to be sure was different, in the former the impression being drawn from cast letters which rise outwards; in the latter from plates cut hollow within by the artist's graver. ”

“ All engraving consists of cutting with a sharp instrument into a hard surface, whether of wood or metal, so that when the picture is perfected on the wood or metal, ink may be applied to the surface, from which fac-similies may be taken off by the impression of moistened paper on the block or plate by means either of friction or pressure.
The practice thus far is identical whether steel, copper or wood is to be the material engraved. ”

“ The art of engraving on iron or steel for purposes of ornament, and even for printing, in certain cases, is by no means a discovery of modern times; but the substitution of the latter for copper, which has invited the superiority of the British burin to achievements hitherto unattempted by our artists, is entirely a modern practice. ”

“ The next thing is to cut out the blacks (not the whites, as in wood engraving) , and this would be done with two different burins. The engraver would get his vertical black line by a powerful ploughing with the burin between his two preparatory first lines, and then take out some copper in the thickest parts of the two curves. This done, he would then take a finer burin and work out the gradation from the thick line in the midst of the curve to the thin extremities which touch the perpendicular. ”

“ The needle removes the ground or cover and lays the copper bare. Some artists sharpen their needles so as to present a cutting edge which, when used sideways, scrapes away a broad line; and many etchers use needles of various degrees of sharpness to get thicker or thinner lines. It may be well to observe, in connexion with this part of the subject, that whilst thick lines agree perfectly well with the nature of woodcut, they are very apt to give an unpleasant heaviness to plate engraving of all kinds, whilst thin lines have generally a clear and agreeable appearance in plate engraving. ”

“ But at present we are only occupied with etching as practised separately and within the limits of its own resources.
The artist who makes use of this method has to scoop no laborious furrows. He draws with the needle, on a copper plate covered with a coating of varnish, suggestions of form as free as the strokes of pen or pencil. At first these strokes only affect the surface of the copper where the needle has freed the plate from varnish. ”

“ Steel and copper engraving require a very good knowledge of drawing, and careful manipulation. A great advantage has been gained by substituting steel for copper plates. One beauty of steel engraving is that it can be done at home. Men like easy employments, and so have appropriated this one. An engraver must learn to convey the feelings of an artist. Lithography has seriously interfered with steel engraving, and photography has to some extent. There are very few journeymen engravers. Most go into business for themselves. Some women are employed in engraving copper cylinders for calico prints. ”

“ CHAPTER III METAL ENGRAVING—THE INVENTION—EARLY ENGRAVERS—NATIONAL CHARACTERISTICS—A PROGRESSIVE REVIEW
"The influence of the graver is so great and extensive that its productions have constantly been the delight of all countries of the world and of all seasons of life."
Metal Engraving—The Invention.—The engraving of metal plates for pictorial reproduction was a direct development of ornamental engraving. The Italian Niello work of the fourteenth and fifteenth centuries was chiefly applied to the embellishment of metal ornaments and utensils with elaborate engravings. ”

“ The first pull is then taken as in a line engraving with a copper-plate press, and its appearance shows what corrections are necessary. The plate nearly always requires a certain amount of engraving; the high lights may be improved by means of a burnisher, the shadows by means of a rocker or a roulette—a small steel wheel the rim of which is beset with fine teeth—and so on. Finally, if a large edition is required, the plate is steel faced.
Although much used for the reproduction of pictures, photogravure is too rarely employed for scientific purposes ”

“ If the copper be varnished, or covered with a coat of wax, they will not deposit themselves or go together at all; but where they find the clean surface of the metal, they at once not only settle, but fix and adjust themselves in their proper forms, building up as it were a metal structure, not eccentric or uneven, but forming a correct plate of new metal, so pure, so hard, and so free from defect or extraneous matter, that engravers prefer copper plates thus formed to any other for working upon. ”

“ If the ne plus ultra of wood-engraving were to produce imitations of metal-engraving of inferior effect, and with much greater labor, then Mr. Harvey’s Dentatus were the ne plus ultra of wood-engraving.
But wood, within its own legitimate bounds, is greater and more effective, in some peculiarities, than copper. Just as copper, in other peculiarities, is greater than wood. Neither was ever intended to clash or contend with the other. Each in its own empire is supreme. ”

“ Methods of Engraving (see also under Lapidary) .—In gem-engraving the principal modern implement is a wheel or minute copper disk, driven in the manner of a lathe, and moistened with olive oil mixed with emery or diamond dust. There is no clear proof of the use among the ancients of a wheel mounted lathewise, but we have abundant indications of drilling with a revolving tool, which might be either a tubular drill making a ring-like depression, a pointed tool making a cup-like sinking, or a small wheel with a cutting edge, making a boat-shaped depression. ”