Preparing graphics for halftone printers

1. How do you halftone an image for screen printing?
2. What does halftone mean in printing?
3. How were halftones made before computers?
4. Why do we sometimes print the centers of halftone dots closer together or further apart?
5. Do you need RIP software to screen print?
6. What is the halftone process?
7. How do you do halftone?
8. Why is it called a halftone?
9. How did newspapers work before computers?
10. Who introduced halftone printing in India?
11. How do you calculate halftone dot size?

How do you halftone an image for screen printing?

Method 2

1. Once you have your art set up and your color gradients set, go to Image > Mode > Grayscale. ...
2. Repeat the same process, this time, going to Image > Mode > Bitmap, which will prompt the window below. ...
3. Select the drop-down menu under Method, and pick Halftone Screen. ...
4. Once this is done, hit OK.

What does halftone mean in printing?

Definition: Most photographs, paintings, or similar pictorial works reproduced in books, magazines and newspapers are printed as halftones. In a halftone, the continuous tones of the picture being reproduced are broken into a series of equally spaced dots of varying size, printed with only one color of ink.

How were halftones made before computers?

Halftones were made like this: the original printed photograph was re-photographed through a glass screen with a pattern of tiny apertures, onto a film or a plate. This was then developed at very high contrast, resulting in dots which varied in size according to the intensity in the original.

Why do we sometimes print the centers of halftone dots closer together or further apart?

Lighter colors use fewer or smaller dots, as the paper showing through is what lightens the color. The dots being further apart means they are more visible and can result in thin lines and the edges of shapes or letters to start to look broken when reviewed close up.

Do you need RIP software to screen print?

Maybe the first question that comes to your mind is, “What's a RIP?” Most screen print designs are one or two colors, or spot color. ... That process, a “RIP,” is accomplished with Raster Image Processing (RIP) software. You don't always need to use a RIP when printing halftones though.

What is the halftone process?

Halftone process, in printing, a technique of breaking up an image into a series of dots so as to reproduce the full tone range of a photograph or tone art work. Breaking up is usually done by a screen inserted over the plate being exposed.

How do you do halftone?

Pick your color space by going to Image > Mode > [choice of color space], or just leave it as-is. For the halftone, go to Filter > Pixelate > Color Halftone to open the dialog box. In the top menu, Max Radius dictates the size of the dots; the higher the number, the bigger the dots.

Why is it called a halftone?

The word “dot” was first used in the graphic arts to refer to the tiny pattern of dots that can simulate a continuous tone image using solid ink. ... Such an image, composed of a pattern of tiny dots, is called a halftone.

How did newspapers work before computers?

Originally, the story was written on a typewriter and then handed to a linotype guy who would then use his keyboard to make the words and spaces that turned into "lines" made of lead. Someone would then put together these letters/words/spaces in a form that represented the newspaper page.

Who introduced halftone printing in India?

The process of halftone printing was introduced in India by Upendrakishore Ray of U. Ray and Sons.

How do you calculate halftone dot size?

Formula #2: Mesh Count/ 4 or 4.5= LPI

For example, if we only have a limited number of screens available and the highest mesh count on hand is 196. We can then divide that by 4 or 4.5 to determine halftone dot size to use. Lines per inch can be determined by dividing the mesh count that you are using by 4 or 4.5.