Printing original image copy and film output

The word "photographic manuscript" is often used in the field of image production. Photographic originals are opaque figure parts with black solid blocks in a white, clean background. The resolution of the text output from the laser printer must be at least 600 dpi to be a photographic original. Duplicated photos or graphic documents output from a fax machine cannot be used as photographic originals because the density of such images is not large enough to produce positive pictures.

Quality manuscripts and high-quality positive films created from this manuscript determine the quality of typographic plates, because if the manuscripts are poor, there is no way to compensate for the typographic plates.
If possible, the size of the original document is preferably twice the size of the printed product. Because if the size of the original is large, a lot of bleed can be reduced in the reduction of the photograph, so that the resulting positive picture image is clear and the edge resolution is good.

Most pad printing manufacturers have the ability to modify the draft, or use computer scans to process unmanifested manuscripts to produce an ideal photographic film.

Imaging system

There are many methods for making positive films, such as dry film, direct film, photographic film, and laser output. If the use of graphics software, such as CorelDRAW, Adobe, Illustrator and Freehand make 1:1 manuscripts, you can use a laser printer or imagesetter output film.

Dry film output system

Dry film output system uses thermal energy to copy images on paper or film, the same principle as the fax machine imaging on fax paper. One drawback of the dry film output system is that the imaged paper cannot be kept opaque black and it fades to brown. If it is used only once, brown is not a problem, but if you want to save the paper for later use, you should use it instead. Film, or saved as an electronic file.

Direct output system

The direct film output system uses a computer to directly output photographic film without a photographic process. When the image is imaged on a film, the carrier removes the film from the image-stripping device and places it in an automatic developing device. Because the film is never exposed to the air and is not contaminated by airborne dust, this film-out system ensures the cleanliness of positive images. This film can be stored for a period of time without fading problems.

laser printer

Laser printers with a resolution of 600 dpi or more can make photographic originals. The higher the resolution, the better the quality of the output film. Coated paper works best. Inkjet printers are not suitable for outputting photographic originals because the density of the output documents is not sufficient.

There are many kinds of special paper or transparent materials on the market for laser printer output. The images output from these special papers are of good quality, high density, and good coverage. It is best not to use a transparent acetic acid base for laser printout because the output image density is not enough and the image hiding is not good. It is also possible to stack the same output acetic acid sheets together to increase the image density.

The laser-printed document is not as good as the photographic original that the image-setter produces, especially for printing fine lines or printing small-size images. Usually the density of the image is not enough and the coverage is not good. In order to make up for this defect, manufacturers have specifically developed and produced a post-treatment spray and coating material. After the laser printer outputs the photographic original, the spray can be sprayed on the surface of the image, which helps to increase the hiding power of the image.

Plate camera

The photographic originals are used in the lithography. The originals are placed in the copy holder, and the photographic images are taken at the required magnification. According to the type of the film, positive or negative images are produced. Photosensitive films are automatically developed or placed on the developing disc for development. The film may be contaminated by the surrounding environment during development, but this method is still used by most people. One of its advantages is that it does not require that all manuscripts be produced by computers.

Publisher

Some pad printing factories cannot make photographic films themselves, but need to go to the outside film companies or graphic studios to make films. The production of the original manuscripts is based on the hourly basis, while the Yangyangtu films are priced on an area basis. (to be continued)