Posts tagged ‘printing’

Can I use sunlight to burn my screens if I run a small shop with minimal equipment?

Yes, I used to do this when our exposing unit was too small for the screen, or if the bulb had burned out and we couldn’t wait for a new one.

As an aside, this is a method I generally do not recommend, but if you have no other options, it is possible. To begin, use spray adhesive on the film and then press it onto the shirt-side of the screen to be burned. Make sure that the adhesive is sprayed evenly so as not to leave spots of heavier deposits on the film. The trick to this method is not to expose the other side of the screen (squeegee-side) while it’s being handled under the sun.

To avoid exposing the other side of the screen, I’ve used a cart on wheels that is at least as big as the screen. Cut a piece of foam that is at least as thick as the screen is and fits on the inside of the screen. Cover the foam with black T-shirt material, then lay the screen with the substrate side up and place the film in position. Don’t forget to put the film face down.

Now place a piece of glass on top of the screen that is at least as big as the screen and place some weighty object, such as a quart of ink, to push the glass, film, and screen down onto the foam beneath. Be sure to put the weight around the design on the film so that it can be exposed evenly by the sun. The weight will promote the best contact between all the layers. Now simply cart the screen to where you want to expose it.

Another tricky part is getting the right emulsion exposure. You may think that on a cloudy day, the UV rays aren’t passing through, but they are, and on a sunny day, they can be even more intense. Then there is the midday overhead sun which is much stronger than the afternoon sun in regards to the amount of UV available for exposure. I strongly recommend not using a pure photopolymer emulsion as those are just too sensitive for this technique. It may take some experimentation to get the exposure just right.

Kieth Stevens is the Western regional sales manager for International Coatings. He has been teaching screen printing for more than 10 years and is a regular contributor to International Coatings’ blogs.

International Coatings manufactures a complete line of Centris™ non-Phthalate screen printing inks, including a wide variety of whitesspecialty inksspecial effects inks,color matching systemsadditives and reducers.  In addition, International Coatings also manufactures a line of AXEON™ non-Phthalate, non-PVC special effects inks. For more information on our products, please visit our website at www.iccink.com.

May 18, 2017 at 1:29 pm Leave a comment

How do I avoid the white spots that pop up on my garment after curing?

Printwear Questions (6)

This was a question posed by a Printwear reader, and here is Kieth Stevens’ response:

This issue happens at times when using a white underbase ink that contains a blowing agent. The blowing agent helps improve opacity and control dye migration. However, the blowing agent contains microbeads that inflate when cured, and some may pop, leaving a hole in the inks printed on top. To help mitigate this issue, use a quality white ink that does not contain a blowing agent, or flash the white a little longer to get the blowing agent to begin puffing earlier. Over-curing the ink may be another cause for the popping as well.


Kieth Stevens is the Western regional sales manager for International Coatings. He has been teaching screen printing for more than 10 years and is a regular contributor to International Coatings’ blogs.

International Coatings manufactures a complete line of Centris™ non-Phthalate screen printing inks, including a wide variety of whitesspecialty inksspecial effects inks,color matching systemsadditives and reducers.  In addition, International Coatings also manufactures a line of AXEON™ non-Phthalate, non-PVC special effects inks. For more information on our products, please visit our website at www.iccink.com.

May 9, 2017 at 5:16 am 1 comment

What kind of basic tools should I own for cleaning my screens off?

Carboard-Ink-Scoop

Cardboard soaking oils from plastisol ink

A reader posted this question on Printwear. Here’s a quick tip from Kieth Stevens:

Although popular, it’s best to stay away from cardboard scrapers as they tend to soak or absorb the liquid portion of the inks. Some screen supply stores offer specially designed plastic ink scrapers. These plastic scrapers feature rounded corners so they avoid harming the screens.

As far as the cleaning liquids go, there are many available that do a great job. You can usually use an ink degradant on the screen to help break down the ink chemistry. However, they seem to be greasy in nature, so once you have cleaned the screen with a degradant, it may be difficult to get tapes to stick to the screen. It is often necessary to add a final cleaning using a more aggressive solvent to achieve a clean, dry screen.

Kieth Stevens is the Western regional sales manager for International Coatings. He has been teaching screen printing for more than 10 years and is a regular contributor to International Coatings’ blogs.

International Coatings manufactures a complete line of Centris™ non-Phthalate screen printing inks, including a wide variety of whitesspecialty inksspecial effects inks,color matching systemsadditives and reducers.  In addition, International Coatings also manufactures a line of AXEON™ non-Phthalate, non-PVC special effects inks. For more information on our products, please visit our website at www.iccink.com.

April 11, 2017 at 11:01 am 1 comment

The Best Place to put Your Washout Booth

InkWashStation (Rev)Where is the best spot for a washout booth in my production layout? This was a question posed by a Printwear reader, and here is Kieth Stevens’ response:

Typically, the best spot for a wash-out booth is nearest to a water source. However, the best spot for your booth can depend on what you are washing out. If you are washing out emulsion after exposing the screen, you want the washout booth set up close by to avoid further exposing the screen to outside ambient light before washing it out.

However, if the washout booth is going to be used just for reclaiming screens, then it is best located closest to a convenient area for reclaiming. If the washout booth is used for cleaning screens after printing with a water-based ink, then locating it closest to the print area would be best.

Remember, it can be very noisy when blasting a screen with water pressure, so it’s also generally a good idea to make sure the booth isn’t too close to offices, the breakroom, or anywhere in the shop where you want to avoid excessive noise.

Kieth Stevens is the Western regional sales manager for International Coatings. He has been teaching screen printing for more than 10 years and is a regular contributor to International Coatings’ blogs.

International Coatings manufactures a complete line of Centris™ non-Phthalate screen printing inks, including a wide variety of whitesspecialty inksspecial effects inks,color matching systemsadditives and reducers.  In addition, International Coatings also manufactures a line of AXEON™ non-Phthalate, non-PVC special effects inks. For more information on our products, please visit our website at www.iccink.com.

April 4, 2017 at 5:36 am 1 comment

ISS Atlantic City Starts This Week

ISS17_AC_637X375

Come join us at the ISS Atlantic City Show starting this Thursday, March 23rd – Saturday, March 25th at the Atlantic City Convention Center. John Levocz will be in attendance, so be sure to connect with him there.

Don’t miss our latest products showcased at our distributor partners’ booths:

Davis International, Booth 1437

Nazdar Source One, Booth 729

See you there!

March 20, 2017 at 2:00 pm 1 comment

Happy St. Patrick’s Day!

St-Patricks

Catch the luck of the Irish this St. Patrick’s Day!

Try out our 700 Series direct plastisol screen printing inks in these various greens:

777 Lime Green

775 Dallas Green

733 Kelly Green and

776 Dark Green

International Coatings manufactures a complete line of Centris™ non-Phthalate screen printing inks, including a wide variety of whitesspecialty inksspecial effects inks,color matching systemsadditives and reducers.  In addition, International Coatings also manufactures a line of AXEON™ non-Phthalate, non-PVC special effects inks. For more information on our products, please visit our website at www.iccink.com.

March 10, 2017 at 2:24 pm 1 comment

Building a Darkroom for Print Shops With Limited Floor Space

darkroomracksCan you suggest some approaches to building a darkroom for a screen-printing shop that has a limited floor space? This was a question posed by a Printwear reader, and here is Kieth Stevens’ response:

A booth can often be constructed of black plastic sheeting, which is relatively cheap to purchase. Choose a location close to the washout area to minimize exposure to light. Simply construct a 1′ x 3′ wooden frame and determine where to place the entry to the dark room. Staple the plastic to the frame and overlap some plastic to create the “door.” By overlapping the plastic sheets, it will minimize the light coming through during entry and exit. Also, be sure that the plastic cover reaches to the floor to block out light completely.

Another way to create a darkroom with limited space is to repurpose an existing room. For example, if the bathroom is not too small, turn it into a dual-purpose room. Repurposing a closet is also a great way to make use of the space you have.

Stand in the darkroom prior to use to be sure that there is no light leaking into the room. It may be necessary to block out minute shafts of light coming in through the bottom or sides of a door. Use plastic sheeting or light-blocking curtains to eliminate any light contamination. Consult your emulsion manufacturer as to which lights would work best and add a dehumidifier. In such a closed room environment, your screens will dry faster and more thoroughly when moisture content is controlled.

Kieth Stevens is the Western regional sales manager for International Coatings. He has been teaching screen printing for more than 10 years and is a regular contributor to International Coatings’ blogs.

International Coatings manufactures a complete line of Centris™ non-Phthalate screen printing inks, including a wide variety of whitesspecialty inksspecial effects inks,color matching systemsadditives and reducers.  In addition, International Coatings also manufactures a line of AXEON™ non-Phthalate, non-PVC special effects inks. For more information on our products, please visit our website at www.iccink.com.

March 7, 2017 at 5:04 am 1 comment

Older Posts


Image of the Month

"Gellusion" Atom Print

"Gellusion" Atom Print

Enter your email address to subscribe to this blog and receive notifications of new posts by email.

Join 1,181 other followers

Recent Posts

Visit us on Facebook

Categories


%d bloggers like this: