Fig. 156.—Key and Quoins.
Distribution consists in replacing the types in their respective boxes after the form has been printed, and is no longer desired. The matter should first be thoroughly washed, then unlocked. The distributer lifts out several lines of the type, holding them in his left hand, with the nicks uppermost and the letters facing him. One or more words are picked from the top line with the right hand, and each letter is dropped into its box, after which several more words are picked up and similarly distributed.
A few pointers in regard to presswork may be helpful to the beginner.
The Tympan, or metal bed upon which the paper to be printed is placed, should be padded well with paper to make a firm impression, the number of sheets required depending upon the character of the form. These sheets are held in place by means of the iron clamps which slip over the ends of the tympan (see [Fig. 160]).
The first print struck off probably will be imperfect, that is, some portions will be lighter than others, due to uneven impression. This is overcome by what is known as
Overlaying the form. Make several impressions, including one on the top tympan-sheet. Then cut out the light portions of a print and paste them directly over the corresponding printing on the tympan-sheet (see [Fig. 160]). Thin tissue-paper will be found good for building up portions requiring but little increase in pressure.
Underlaying consists in pasting strips of paper to the back of type or cuts which print unevenly, to make the low portions higher.
When the form prints satisfactorily, you must prepare the marginal lines before running off the job. The margins can easily be marked off upon the tympan-sheet, as you have the impression upon it for a guide (see [Fig. 160]). When this has been done,