What is dye line printing process?
Whiteprint describes a document reproduction produced by using the diazo chemical process. It is also known as the blue-line process since the result is blue lines on a white background. It is a contact printing process which accurately reproduces the original in size, but cannot reproduce continuous tones or colors.
What’s a dye line?
A dieline serves as a package template that ensures proper layout for a printed product. It is a diagram that shows all the cut lines and folds of a package in flattened form. Sometimes a client will send a printing company an example of how they would like their packaging to look.
What is a blue line in printing?
A blueline is a proof made by a commercial printer and presented to a client for the purposes of checking the elements of a printing job that has been photographed, stripped up, and imaged. The negatives from which the plates for the press will be made are imaged onto thin blue light-sensitive paper.
What type of light source is used in the exposure process when creating a diazo reproduction?
The diazo process involves the destruction of a diazonium salt coating by exposure to ultraviolet, violet or blue light.
Which compound is used to develop blue print maps?
The blueprint process is based on a photosensitive ferric compound. The best known is a process using ammonium ferric citrate and potassium ferricyanide. The paper is impregnated with a solution of ammonium ferric citrate and dried.
Can you over expose photo emulsion?
Over-exposure causes a loss of detail in your image area. When photo emulsion is exposed to UV light, it polymerizes or will crosslink, making it more difficult to wash out. Extreme over-exposure can “burn” through the opaque areas of the film positive rendering the stencil a solid block of hardened emulsion.
How long do I expose photo emulsion?
Here is how I gauge the exposure: the emulsion is a slime green color and as it exposes it begins to turn to a dark gray/green. Once you see it darken considerably it has been exposed….it should only take 2-3 minutes depending on how strong the sun it.
How do you know if your image is overexposed?
It doesn’t matter if the photo is in color or black and white.
- If a photo is too dark, it is underexposed. Details will be lost in the shadows and the darkest areas of the image.
- If a photo is too light, it is overexposed. Details will be lost in the highlights and the brightest parts of the image.
How do you know if emulsion is exposed?
Soft or gooey emulsion First, you might have laid down too thick of a coating of emulsion on your screen. If that’s the case, you likely will notice a softness, or gooey texture upon washout, on the squeegee side of your screen, the side that wasn’t exposed to UV light.
Does photo emulsion go bad?
Unopened photopolymer emulsions (SBQ) can last a couple years if stored properly. The main factor in proper storage is temperature. When it gets too cold, emulsion can freeze. This is because when the emulsion arrives to your shop, it will have gone bad.
How long does emulsion take to dry with a fan?
It all depends on the humidity and the air circulation in the room, but in a somewhat standard room, I would estimate it would take anything from 4 to 8 hours for the emulsion to dry up, depending on how much you put on.
Does emulsion wash out?
Emulsion washing off or breaking down in wash out. Water pressure is too high during wash out. Don’t blast the emulsion out too quickly, turn down the pressure and keep the water flow or jet moving about the screen. Give the screen a little soak for 30 secs before starting the wash out.
How do you remove stubborn emulsion?
Reclaim A Screen in Four Simple Steps
- Wet the screen.
- Apply Chroma/Strip and let soak for 15-30 seconds. Do NOT let this dry.
- Scrub with a brush until the emulsion starts to break down.
- Rinse both sides of the screen with pressure washer.
Can photo emulsion go down the drain?
Grease and oils, in large qty, can be difficult to get down a drain sometimes due to the fact that they are less dense then water so they want to float…. however emulsion is nothing like grease/oil.
How do you get emulsion off?
Emulsion paint, also known as latex or acrylic paint, is a water-based, interior paint with acrylic polymers. It is used mainly on interior walls and ceilings. Removing this paint when it is still wet is very easy–just use soap and water. Removing it after it has dried is more difficult–but not impossible.
Will a heat gun remove emulsion?
I think what I’d be most inclined to do is use a heat gun to scrape it off. Both emulsion and oil based paints will soften from heat, but I don’t think you can damage real plaster with the 3 or 400 degrees F you’re likely to be able to achieve with an electric heat gun.
Is it OK to wash clothes with paint on them?
If it’s a water-based paint, the solution is simple: All you need to do is rinse the piece of clothing in warm water until the paint color subsides, then launder that item the way you normally would (washing machine or hand washing, for example).
Does emulsion come off carpet?
If the paint is still fresh, blot it up with paper towels or white cloth. Since emulsion paints are not as tough as oil paints, this should be done quite quickly. Do not scrub the paint in the carpet, because instead of getting absorbed outward, it might get absorbed in the carpet fibres and that is not what you want.
Will vinegar remove paint from carpet?
Latex Paint Saturate the dried paint with water, then vacuum the area with a wet/dry vacuum. Repeat this process to remove as much paint as possible. Add 1/4 teaspoon dish-washing detergent or vinegar to 32 ounces water. Continue spraying and scrubbing the area to remove the paint.
How do you get blue emulsion out of carpet?
If the paint stain is still wet, simply blot the spot with a wet paper towel – don’t scrub, just blot. If the paint stain is dry, use hot water and a little bit of dish detergent. Let the solution sit for a few minutes to soften the paint. Once the paint is softened, use a knife or pin to scrape the paint stain.