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Home » Computers And Internet Articles » Screen Press Printing Looking At The Process

Screen Press Printing: Looking At The Process

Screen printing also called silk screen print also called serigraph was invented in the Far East around 2000 years ago. No supplemented data on when or where exactly it originates, but originally used to make the screen printer's screen. A paper stencil was stiched onto the screen to control the print area.

Around a hundred years ago screen printing was reinvented in the west and it has become a common method of printing on textiles. Most common, the custom t-shirts. The screens used for screen printing custom t shirts, are made with a mono filament mesh. Photopolymer emulsion is used to make the stencil. Thus, silk screen is coated with the liquid emulsion, and allowed to dry and harden. The emulsion is light sensitive. The stencil is made in the "silk screen" by placing a positive of the print over the coated silk screen then exposing the screen to light. The areas of the screen shielded from the light remain water soluble and can be washed out of the screen. The light affects the emulsion in that once the dried emulsion has been exposed to light, water will not dissolve it. Take a look at the photograph to the left. In this case the positive for the screen print is hand drawn.

The availability of the screen printing products can be purchased locally from screen printing process supply stores. An "emulsion cup" is used to coat the silk screens with emulsion. The emulsion cup is a trough like cup that holds the liquid emulsion and allows it to be spread evenly across the screen. The screen is held vertically and the emulsion is spread from bottom to top with one smooth motion. After the silkscreen has been coated with emulsion it will be left to dry. Ambient or soft light can expose the screen but it would take hours or days. Even so care should be taken that the silk screen is kept in a dark place.

To "burn" a screen, the positive must make tight contact with the screen. A four inch thick foam rubber pad is placed under the screen with the glass placed on top. Sunlight can now expose the silk screen. It can take anywhere from around two to fifteen minutes. After the screen has been exposed it is taken to a wash out area usually a metal bathtub like trough or large sink. The screen is set in the trough and sprayed with a garden hose. Rinsed with water, after a second the design will be visibly lighter in the emulsion. After a minute or so of rinsing the design area should be free of emulsion. Rinsing is continued for another minute or so to wash away emulsion scum that if allowed staying in the screen and dry will clog printing areas. The washed out screen is then allowed to dry.

After it has dried the screen must be taped off. This is usually done with masking tape. The areas around the edges not coated with emulsion are taped front and back. The screen printer applies tape liberally over the frame and screen areas. The screen is then "pin holed". Sometimes imperfections in the screen printing process cause tiny "pin holes" in the emulsion that's why these must be taped over or blocked with emulsion or block out fluid. This is done on the bottom of the screen.

The emulsion can be removed from the screens so that the screens can be reused. This is called "reclaiming" the screen. After the print run the ink is scraped out of the screen and mineral spirits or ink wash is used to clean the ink from the screen. All the masking tape is pulled off the screen and the screen is sprayed with "emulsion remover." This chemical is left on the screen for 2 or 3 minutes and a high pressure sprayer or even a garden hose can be used to wash away the emulsion. After the emulsion has been removed the screen must be degreased. There are degreasing liquids available also ivory soap works well. The screen is scrubbed thoroughly on both sides and then rinsed. It can now be dried and if kept clean reused. The screens must always be clean and degreased and dry before they can be coated with emulsion.

These procedures may sound very difficult but the application is totally easy. See and try the screen printing yourself!

And here is another random article you might be interested in...

Plan Your Success In Seven Ways

Many businesses lose money yearly because they don't think creatively about the future. They run their businesses doing what they think they should: dealing with customers, dealing with problems, ordering for their business, and paying their expenses. They act like their business is a job. They are surviving and that's it. They are not looking at the big picture. They need to use their business as a stepping stone to success. Picturing themselves as a successful business person, and setting up a plan to succeed.

Many of the businesses today are started by people who have been downsized or laid off. They are used to showing up for a job and getting paid, and this is how they are operating their business.

The first thing you must do is to find out what you are really good at. Many people want to know, "How can I make more money?" Unfortunately too many business people never ask themselves, "What am I good at?" They need to do so, and then ask it again every time they want to do something new. This is one of the biggest reasons businesses fail. The owners did not focus on what they were good at and did best. This does not mean you can't try something different. What it does mean that it is best to go with the skills and experience you already have.

The second thing you need to do is take an objective look at yourself. Take a piece of paper and write down what you can and can't do. Picture yourself hiring you. Would you hire yourself? Would you be impressed? What do you know best? What are your hobbies? Can you turn that hobby into a business? Remember you work best at something you enjoy.

I was an exceptional secretary, so I started a word processing business. I loved typing and taking dictation by telephone, writing up letters, proposals and setting up identity packages. However, I hated having to drive around town to pick up and deliver projects, and cold calling for business. So after losing money, I shut down the business. A couple of years later I started another business where I was the assistant to businesses, but worked from my home. I got to do all the secretarial aspects, but out of a home office. All I had to do was send flyers and mailers to independent contractors. I also worked with answering services for referrals and gave them business, plus a cut of my fee.

What this means is you need to discover what your likes and dislikes are. People like to work at things they do well. They enjoy themselves more. A test for you is to think back over the last couple of days. Then make a list of the things you enjoyed doing. Think about when you were the happiest and what you were doing.

The third thing you need to think about and be able to recognize is: What your competitive edge is. After you do the above test and find out what your strengths are, you will find that some of these strengths give you an advantage over your competition. Do your particular strengths and abilities help you provide exceptional customer service? Can you do something or produce something that others can't?

If you already have an edge over others, put it to use. Make your customers aware of your unique qualities. The way to accomplish this is to be sure any advertising or promotional campaign you employ highlights your unique selling points.

The fourth thing you need to do is to plan ahead. While your business concept or product might be unique now, as we know people love to copy what is successful. So you need to plan for the long run. You need to be aware of what your competition is doing and keep your customers coming back.

The fifth thing is that just because there are things you don't like about your business, doesn't mean you give up. Yes, there are going to be certain things you like better than others. Every business person feels this way. However, if you don't like anything about what you are doing, then you might want to start a new business. Be sure before you do so, you give yourself the above test.

The sixth thing is sometimes you just need to make some changes in your business. See if there are certain things you can cut out of your business, a product or service, which you might not enjoy and it is not a profit center for you. Then drop it, and concentrate on those things that are generating a profit.

Maybe you need to make changes to make your job easier, such as buying new software, or a new computer system. Maybe hiring someone on a part time basis could take some of the workload off your shoulders, and allow you to concentrate on other business matters.

And last but not least is to be sure you take what you've learned about yourself, and set up a plan for your business for the future. Don't forget to write down what you're good at and ways that you can apply your skills to making money. You can take this information about your skills and put it in your promotional materials. Be sure you always have a notebook (or a voice recorder) with you to joint down notes to yourself, new business ideas to try. You want to be sure when you do write these things down that you also put a date next to them to implement that idea or strategy. This will give you goals to work for. Be sure to put these goals in a prominent place in your office. I put my goals on index cards and then put the index cards on my desk, on my calendar, and on my bulletin board. By having your goals visible to you, it will help you to stay on track. And, that is what it is all about â€" keeping your business growing and prospering.

Copyright 2003 DeFiore Enterprises