Mobile register and journal., 1845-03-14

10 any extent. may be re propuaed ia two or lhres days pr less, and hundreds oi thousands struckkof, equal in all respects the ignal The importance of this great discovery scarcely he oVeraIed-il is next To iha of printing itself SIereol,ping wi entirely be suspended The new process s ln- fnIiey cheaper, more simple, and more permanently effective. The rt-Umion desci ibes il as follows
 "The principal merit caiued by tie propretors Of this patent are, in the first place. their method of re- beating, in low relief tsomeIhing like Photographic printing suriace,) the lracerv of an engraved wood block copper plate in such manner as immediately 10 yield impressions which not in any way 10 be distinguished from those drawn from tbe original en- graved surface This s effected by means of acdR, d
 uted various degrees of strength. which act upon those parts of the plates remaining unprotected ny the ink and so leave the printing surface very slightly m relief. Another chief merit of the invention Is the successful provision against the spreading of the ink under any degree of pressure, whereby the finest lines and sharpesl edges are repeated with singular pre- cision Another ext arodinary result oi the ibven- tion the restoration of the ancient or injured en gravIng echings-ihat is, if engraving has been inured-nOt, be il understood, regards the paper, but faded through caTeessnes, delaced by accident such engraving can be perfectly restored, by hav- ing every line and touch reres'ed with new ink SD to give the work with all it's deIails as fl fresh from the wood copper
 To describe briefly the preparation of plate or c, finder, let suppose newspaper about to be re- printed by this means The sheet is first moistened with diluted acid and placed between sheets of blot ting paper, m order that the superfluUus moisture may be absorbed. The ink neuraIizes the acid |, which is pressed out from the blank space only, and elches them away. In all cases where the latter press is of recent date, perhaps older than half year, a few minutes suhces for this purpose The paper is then carefully placed UpSn the plate with which the letter-press to be transferred is in mme diaie contact, and the whole passed under press on removal from which, and carefully disengaging the paper the letters found to the plate winch is then rubbed with preparation of gum, |, aller which the letters receive an addition of ink which is immediately incorpo' ated lth that hy winch they already formed These operations elfec- ted in a few minules. I he surface of the plate round the letters is bitten in very slight degree by the acid and application of the ink. il is rejected by the zinc, and received only by the letters, which are charged with ink by the common roller used in hand printing. Each letter came from the press as if il had been imprinted by type metal; and the copies are fac smiies which cannot be distinguished from the original sheet.
 Thus far il may be necessary to describe the pro- cess, that it may be understood by those of our cad who rot sersant with Photographic manipula- tion-lhose who are, will recognize some similarity in the method of preparing the stone and the zinc, far as regards the gum, SIC The practcability Oi transferring letlerpress, especially prepared quite recent to stone or zinc, has long been known main advaniage, however, aud most important one, pus- sessed by zinc the stune, d material to work from, is it's portability, and being easily formed into cylinder; for, although we have only spoken of plate of zinc in reai ion to the results have witnessed, il is to be understood that in the exten- si'e operations c, finders will be employed"