Dye Sublimation Printing Vs Screen Printing
Answer: The two styles of printing are markedly totally different. The similarities are that both are printed on substrates and each produce a picture. Except for that? Not so much.
The display screen-printing course of makes use of a very labor intensive set up that you don’t have with dye sublimation printing.
I am going to walk you through the display printing course of as I know it fairly intimately, since that is where I began my profession within the graphics enterprise.
Central to the screen printing process is the display (duh, proper?). The display is still usually called a silkscreen, though silk has not been used for many many years since the advent of nylon thread.
There are numerous kinds of display mesh, beginning at round 100 threads per sq. inch and going as much as several hundred threads per sq. inch. The more coarse mesh is turning into much less common as it’s used with oil-based enamel inks which have been replaced, by and enormous, with UV inks, which we run by a 220 mesh count as the ink particulates are a lot smaller than with the older solvent inks.
The display mesh is often stretched and glued to a wood or aluminum frame, or hooked up to expandable frames or roller frames. When stretching the mesh over a body, we typically take the pounds per sq. inch (as proven on a “Newton Meter) up to 25 or 26, and let the fabric stretch out over-evening.
By the point sixteen to 24 hours have handed, the meter will show that the tension has dropped off to round 15 pounds per square inch, and we repeat the method, and the screens should have about the correct tension at around 20-22 lbs. per sq. inch tension, creating a taut display screen that may ship an excellent, clear print.
Once the display is tensioned and connected to a body, womens captain america tshirt we sometimes use a fabric tape to tape around the edges of the body, both inside and out. This can be a semi-permanent answer to having ink leak out across the edges of the emulsion.
Now the display screen is ready for the photograph delicate emulsion, which is utilized with a scoop coater, a variable size tray that emulsion is poured into. After making use of the emulsion to the display screen, we transfer the display screen to a flat, curtained drying/storage cabinet, the place it dries. Totally different techniques of coated display storage will dry the coated screens at totally different charges, but ours are normally able to expose inside a few hours unless we put a fan on them.
As soon as the emulsion-coated screens are dry, we will now place the movie on the print facet of the screen, in reverse, tape it in place, and move it to a vacuum body. The vacuum body has a large piece of glass upon which the display is placed, print side against the glass. A “blanket” is placed over the display screen frame, and a vacuum motor engaged, and the screen is pressed tight towards the glass.
The vacuum body is now rotated to face an exposure light, which is typically on a timer. The sunshine is turned on, and the photograph delicate emulsion is exposed, however the areas that are behind the movie constructive remain susceptible to water. After the set period of time, typically 6 to 10 minutes, the light will flip off, and the vacuum body rotated back to laying flat, the pressure launched, and the display screen eliminated and moved to a washout tank.
There are semi-automated washout tanks which, once you place the display into it, it should expose the picture with water in a brief period of time. At this level we enable the display to dry, and we’re ready to position it on the display printing press.
After ensuring there aren’t any pin holes (if there are, we use a blockout emulsion to fill them in), we tape the edges to ensure ink won’t leak out across the edges of the print (extra of a difficulty on a clamshell press than one that lifts up and down, leaving the display flat at all times). We line up the substrate, put in blockers, micro-modify the display to the substrate, and we’re ready to print.
The most important weakness of display printing is that we have to make a brand new display for every shade printed, making the arrange time for display printing quite time consuming. However, because the printing course of could be very fast, if there are a big amount of indicators or decals or banners, etc.
Next, we pour ink onto the screen, and print whatever it is we’re printing, say, bumper stickers or automotive window decals or stickers, or window sticker for a business, or signs, or whatever our shoppers order.
After printing, the excess ink is scooped again into the ink bucket, and the display screen removed to a washout tank, degreased, and prepped to repeat the method once more.
Dye sublimation printing of displays and banners is nearly all the time executed on polyester fabric as a result of the chemistry of polyester is suited to dye sub printing. The chemistry involved in dye sublimation printing is fascinating to me, not simply because it’s a posh process, but because the end result’s by far essentially the most excellent printing of cloth banners, posters, and shows obtainable.
There are four dyes involved, similar to an inkjet printer. The shade coding for dye sublimate printing is a bit totally different that the CMYK printing that inkjet printers womens captain america tshirt carry out. The code for the dyes is CMYO (cyan magenta yellow overprint clear).
These dyes are printed on a particular transfer paper, then removed from the printer and matched up with an oxford, satin, knit, or different polyester materials and despatched via heated rollers at approx.. 400F mixed with the stress of the rollers. In this process, the dye converts to a fuel, and with assistance from the heat and pressure, turns into fused with the polyester fibers, and creates an absolutely gorgeous print (assuming the dyes and polyester are good high quality).