The Invention of Lithography. Alois Senefelder

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СКАЧАТЬ paper under the linen was pulled over the inked stone and smeared.

      Several attempts to rectify this trouble were unsuccessful. Probably I would have discovered the remedy finally—either that the upper cylinder must not first be pressed on the stone, which must be under it before each impression began, or that I need only use tightly stretched leather instead of linen. But I decided, instead, in order to complete our work if possible, to have a press made in all haste by a carpenter, of a style like the book-printers' press, wherein the force is applied instantly from above.

      As everything was very rough, the new press was ready in eight days. The first experiment, with a small stone, seemed to succeed. But the larger stones would not give thorough impressions, probably because of the uneven surface of the press, which was merely of wood. I increased the power enormously. A stone of three hundredweight was elevated with pulleys and released suddenly to fall ten feet. It forced a lever down on the press with a pressure of more than ten thousand pounds. The plates gave fair impressions by this means, but generally they were cracked after the first, second, or third impression.

      To determine how much downward force was needed to print a sheet of music, I took a well-ground stone a square inch in area, laid moistened paper on an inked printing-stone, over this a sixfold layer of paper, then a double layer of fine cloth, finally the square inch of stone, and then weights ranging from one to three hundredweight.

      This experience taught me that the square inch of surface demanded three hundredweights of force to make a good impression in a few seconds, and almost less than half that weight when I allowed it to act for a whole minute. According to this calculation the entire sheet, which contained about one hundred square inches, would have demanded thirty thousand pounds; and the stone could have withstood this without cracking, had I been able to apply the pressure evenly. But the imperfections of the press made it necessary to apply a pressure three times as great, and this the stones could not bear.

      To correct the defects of this press was more than I cared about, after I was nearly killed by the three hundredweights, which fell accidentally, and, as I stood immediately under it, would have beaten out my brains had not a miracle caused the load to catch and hold. The thought that a similar accident might cause the death of one of my men made me hate the whole press, all the more so as I had conceived what seemed to me at the time an exceedingly happy idea for a very simple and not costly printing-machine.

      Before I possessed a press of my own, I used to pull proofs of my work in the following manner, in order to avoid the constant trips to a printer. I laid the dampened paper on the inked stone. Over it I laid some heavy paper, and then a sheet of stiff, carefully smoothed dry paper. Then I took a piece of polished wood and rubbed this over the upper sheet of paper, holding the latter firmly to prevent slipping. I continued the rubbing, using more or less power according to whether I wanted the impressions deep or pale. Thus I obtained impressions very often that could not have been better.

      I wondered why this could not be done on a large scale, and proceeded to try at once. I stretched a piece of linen firmly over a wooden frame two feet long and wide. On this linen I pasted a sheet of strong paper, polished on the upper side with wax. Then with two bands the frame was fastened to an ordinary wooden table. Then the stone was fastened on the table under the frame. Inside of the printing-frame was a smaller frame with cords, to hold the paper, which had a layer of gray blotting-paper under it. With a piece of polished wood, or a piece of glass such as is used by polishers, I rubbed the upper waxed paper thoroughly, making sure that every spot was touched.

      The first proof, and several succeeding ones, which I made myself, turned out so excellent that probably few better impressions ever have been made since. Two more presses were made at once, and six printers hired. The work might still be finished in the stipulated time. New hopes thrilled us. Hastily I inscribed the stones and the printing began. But—oh, human weakness! Does it seem credible that of my six helpers not one could master the extremely simple method of manipulation, the mere matter of rubbing evenly and thoroughly? Of six impressions hardly one ever reached perfection. There were blank spaces here and there. Yes, even when, accidentally, they produced three sections of a sheet correctly, the fourth invariably was a flat failure, and thus ruined the entire sheet. We would have been glad enough had we lost even one half the paper, if only we could have saved our credit by completing the work, regardless of our money loss. But of three reams of paper only thirty-three impressions were won in the end.

      I will merely touch on the painful scenes that ensued. The stipulated time had almost expired and no prospect of results. The manuscript and the paper remaining in stock were taken away from us and given to Herr Falter, while we had to suffer severe censure from the Countess, and in her name from others. Herr Gleissner had to pay for new paper, which made a monthly deduction from his salary necessary. The grant of our privilege was endangered, for the Kurfürst had obtained a poor opinion of our process. Indeed, so long as the Kurfürst Karl Theodor lived, all our efforts to obtain a privilege were fruitless. We could not even succeed in having it proposed, although the referee, Herr von Stubenrauch, made us promises from month to month.

      All the money we had earned was lost; debts burdened us; and a monthly deduction of pay, with the mocking laughter of those who had been made envious by our first successes, was the entire reward for our endeavors to make a new art. As it was only the lack of a good press that had caused our failure, I went to Herr Falter, with whom I had become acquainted through Herr Gleissner, and told him the reasons for not finishing the cantata in time. I told him that if he were willing to have a proper press built, I was willing to print his works for him, in his own residence, which was his stipulation, provided I could prepare the stones at home. We agreed, and I ordered a great cylinder press made at his expense. To avoid the old trouble I had both cylinders fitted with cogs, which gave satisfactory results if both printers who handled the press were careful to begin turning the cylinders at the same moment. The double friction of the two rollers made them both pull on the printing-frame and the stone, where, before, the lower cylinder had done just the opposite. The greater periphery of the upper cylinder, which was almost fifteen inches thick, helped also. And to this day I consider this form of press the best for all methods, especially if the stones are thick enough, if one has not to consider the very greatest speed; for in speed this press is decidedly inferior to the lever press and other styles. On the other hand, the pressure is much more gentle, more perpendicular, and less liable to pull the paper out of place than is possible with even the best so-called friction presses. Only there should be added to the cogs an appliance by which the upper cylinder has a screw adjusted over its centre, so that it can be forced down for each impression after the stone is under it. Figure 1, plate I, is the picture of such a cylinder press, made for stone-printing.

      As soon as the press was ready and erected, I began to inscribe on stone the music of Die Zauberflöte, arranged for quartette by Herr Danzy, and with Herr Gleissner we began the printing.

      But Herr Gleissner became dangerously ill. I trained two soldiers to do the printing, left the entire printing process to Herr Falter, and limited myself to the work of delivering the stones to him. The workers ruined so much paper that Herr Falter could not make it pay, and returned to etching on copper.

      During this time Herr Schmidt, professor at the military academy, had begun to etch on stone. As I discovered long afterwards, he was a good acquaintance of Herr Gleissner, who visited him often. Within the last year there is a strenuous attempt to make this Herr Schmidt appear to be the inventor of printing from stone, though probably he never desired this. There have been publications about it already. I shall not notice what has been said, and will let the matter speak for itself. From the foregoing the reader will have seen the natural but laborious way in which fate led me to this invention. If Herr Schmidt made a similar discovery at that time, he was much more fortunate than I. According to his own letter, printed in the Anzeiger für Kunst und Gewerbfleiss, the course of his invention was as follows. He saw a gravestone in the Frauen-Kirche, in Munich, on which letters and pictures were in relief. "That must have been done with acid; it would СКАЧАТЬ