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Imaging Solutions for Screen Printing to Save Money and Improve Quality
Gallery of sample images
showing benefits of
Stochastic Screening
over Halftone Dots
How Stochastic Screening and Halftone Screening Work
Ever print a white picture on a black T-shirt?
Look at how much closer to the original photograph stochastic screening gets you, when compared to traditional halftone dots.
Original Photograph
PowerRIP’s Dynamic Stochastic Screening
Traditional Halftone Dots
After 141 years of halftone dots isn’t it time for a change
Compare halftone screen print images below, with stochastic screen print images. Realise traditional halftone dot technology is now 141 years old and was developed for optical based camera/film systems. Stochastic screening was developed for computer imaging and is only 23 years old.
Since you are not making film positives in a camera anymore why not use the new technology for screening that was designed for computers. PowerRIP ScreenPrint has always offered traditional halftone dots, but with the addition of its new Dynamic Stochastic Screening, it takes all screen printing to higher level.
PowerRIP Dynamic Stochastic Fine Better detail and shadow colors throughout the image. Notice the beads in the headdress, the turquoise necklace, the red lips, and saturated feather colors, see the brown feather lower right.
Corel Vector Art gets a quality boost with Dynamic Stochastic Screens
Halftone 45l LPI with all angles at 22.5
Detail is lost in the beads, the screen pattern destroys shadow colors throughout the image. Notice headdress beads, turquoise necklace, red lips, and feather colors, brown feather lower right
Halftone 45l LPI, Cyan, Magenta, Black 30 degrees apart, Yellow is stochastic.
Detail and color are lost throughout the image. Notice headdress beads, turquoise necklace, red lips, and feather colors, brown feather lower right.
Art Reproduction (Scanned in Van Gogh)
Ok, we are all not reproducing VanGogh artwork, but all artists care about detail. Look at the lost of detail with halftone reproduction. The brush strokes are lost, see the light green mountain, check out the stochastic image to the right.
See the VanGogh brush strokes in the PowerRIP’s Dynamic Stochastic. The brush stroke detail is held throughout the image. Notice the light green mountain with light blue brush strokes. See how much richer all the colors appear.
POP Signage (Point of Purchase)
Halftone 45l LPI, Cyan, Magenta, Black 30 degrees apart, Yellow is stochastic. A halftone screen used in POP signage can interfere if a picture includes a previously printed image. Causing a lost of detail or worst a moire. Check out the starburst on the containers and the lost detail in the fruit.
PowerRIP Dynamic Stochastic Fine.
See how much better the detail and color stand out in this stochastic reproduction of a photograph of a printed product. There are no moire or rosette patterns to worry about. The starburst on the containers jumps out and the fruit has detail.
The purpose of POP signage is to get you to notice a product. The sign greets you when you walk into a store. Printers notice large dots on a display sign, and say to themselves "Screen Printing." Subconsciously the casual consumer notices the dots. The dots interfere slightly with the message. It is like HD TV verses standard TV. When you compare TVs screens in an electronics store your eye is drawn to the HD TV. Stochastic is to print, like HD is to television. Once you see the difference you want it.
Until now Screen Printing has not been the first choice for fine art reproduction, we should all rethink this. Screen printing lays down the thickest layer of ink producing the most vivid colors. It can easily print on canvas. PowerRIP’s Dynamic Stochastic doubles the detail of the screen ruling in use. Dynamic Stochastic at 45 line produces the detail of a 90 line halftone. A fine stochastic at 85 line has the detail of a 170 line offset print, without moire or rosette patterns. All fine art reproduction can be improved with screen printing and PowerRIP's Dynamic Stochastic.
Manufactured items like Ceramic Tile
All manufactured tile uses screen printing to add the color glaze. When you go to purchase tile you normally pick up a piece of tile and look at it about 20 inches from your face. You might be dissapointed when you see the halftone dot pattern, and say to yourself,
”it almost looked like really stone.” PowerRIP’s Stochastic makes ceramic tile look like actual stone, by using a natural random pattern like mother nature. If you consider all the work to make tile look natural, such as picking correct glazes, photographing really stone and texturing the surface, isn’t it time they lost the printed halftone dot pattern on the stone.
Halftone with Ceramic Tiles
Stochastic with Ceramic Tiles
All samples shown are identically enlarged from 45 lines per inch frequency halftone dots or 45LPI frequency stochastic dots
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Stochastic screening, also called FM screening, uses dots of a constant size and varies the distance between the dots to get darker or lighter shades. Stochastic means “random” in Greek. This screening got its name, because the distance appears to vary or be random between dots. This random pattern prevents the eye from detecting a repeated pattern in any image. Detail and color appear better because there is no screen pattern of moires or rosettes interferring with the image itself. Stochastic Screening was introduced first for offset in 1993, and is now a 23 year old technology.
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Regular halftones are called AM screening and use a constant distance from the center to center of each dot, but vary the size of the dots. Because halftone dots are a constant distance apart and larger in size, the human eye detects any repeated dot pattern. This pattern is noticed in all images. Sort of like looking thru a window screen and never seeing a object without a pattern in front of your eyes. Your eyes make an effort to filter the dot pattern out at the expense of detail. Traditional halftones were invented in 1875 and patented in 1893. Halftone screening has been around for 141 years now.