Altogether there are twelve plate cylinders in the machine, each carrying eight plates the size of a newspaper page. Either stereotype or electrotype plates may be used. To receive the latter, which are much thinner than stereotype plates, special base or jacket plates are secured to the cylinders. The ink is applied to the plates by four form rollers, after having been thoroughly distributed by vibrating rollers and cylinders. The full capacity of the machine, when printing all black, on six rolls, is 96,000 twelve-page papers per hour, and other numbers of pages at proportionate speeds, namely, four, six, eight and ten-page papers, at the same speed as twelve-page; fourteen and sixteen-page papers at 72,000 per hour; eighteen, twenty, twenty-two and twenty-four page papers at 48,000 per hour. The three webs from each portion of the machine are led to the top of the folders, where they are divided along their centre line into webs two pages wide, and then run down each of the four “formers,” by which they are folded along their centre. They are then led through cylinders which cut them into page lengths and give them a fold across the page to half-page size. In this way twenty-four page papers may be obtained at the rate of 48,000 copies per hour, by collecting two twelve-page sections on the cylinder just before the half-page fold is made. Another method of running twenty-four page papers is to associate the six webs, from both portions of the machine, and run them over one pair of “formers,” thus folding all six webs together, or insetting them, in the first fold. Lesser number of pages may be obtained by making various combinations, the number of which is almost limitless. Angle bars are placed in the machine for transferring half-width webs of paper from one side of the press to the other, facilitating these combinations. The maximum product of the machine when running as a color press is 48,000 sixteen-page papers per hour, with the two outside pages printed in four colors and black; the other pages in black only. If, however, it is not desired to have so many colors on the outside pages, it is possible to obtain twenty-page papers, at the rate of 48,000 per hour, with the two outside pages in two colors and black; all the other pages in black only. Papers with any number of pages from four to sixteen, with four colors and black on the outside pages, the other pages in black only, can be obtained at a speed of 48,000 per hour. By running the full product of the color section of the machine into one folder and associating therewith webs of paper from the other section of the machine, papers with any number of pages from eight to twenty-four, with the two outside pages and two of the inside pages printed in four colors and black, the other pages in black only, can be produced at a speed of 24,000 per hour.