Correctly Drying Emulsions

Some screen printers may not fully understand the importance of correctly drying the emulsions before exposure. This mainly effects the longevity of your stencil. It can be a bit confusing with dual cure and single cure diazo, so read below and start curing correctly.

  1. Degrease your screen, coat your screen and then allow it to dry horizontally with the print facing down. In any direct stencil work, prior to exposure, the diazo sensitizer is separate from the polymer chains.
  2. During exposure the diazo sensitizer creates cross bonds to the polymer chains and the emulsion gets it to strengthen.
  3. The screen must be completely dry before you expose it, otherwise the sensitizer will react with the water molecules rather than the polymer. The sensitizer will seem to get used up either way, you just want it to be used reacting with the polymer and not water.
  4. The increase of water will be hard on the stencil as well causing it to break down faster.

If you have any other questions please feel free to call 1-800-Mclogan

Adhesive Powders

What are adhesive powders and when do you use them?

Adhesive powders are used when you do screen printing transfers, rather than a basic screen printed job.  It is easier for screen printers to screen print onto a transfer and then apply the transfer to whatever size t-shirt they need, rather than to screen print a lot of garments and then be stuck with wasted t-shirts that didn’t sell.  The kiosk’s at the mall use these screen printed transfers, as well as swap meets, carnivals, festivals, etc.

What are the different types of adhesive powders?

There are three different adhesive powders:

  1. Fine Adhesive Powders are used on more detailed designs, like high-definition graphics or images with fine lines and edges.
  2.  Medium AP’s are the most commonly used of the three powders.  They allow the adhesive powders to melt evenly when heat pressed while still keeping the integrity of the design.
  3. Course AP’s are the least commonly used and are best for larger designs.  Block images, large text, etc.

 

Insta-Lizard-Transfer

Call us today with any questions.  🙂

How To Properly Cure Water-based Inks

International Coatings GEN IV Screen Printing Ink

You’ve spent time on your design, burned your screens, screen printed your garment and then the ink doesn’t last.  It slowly starts to wear off with every wash.  What could have happened?  Is it your ink?

All water-based inks sold at Mclogans have been approved by our company and these inks have gone through many strict tests to ensure that we are selling you the best products.  So when asked if the ink was at fault the answer is no.

Curing water-based inks is what dries them properly, leaving you with a perfect screen printed image with a soft feel and a garment that will last.

The tech data sheet from Permaset states that “the following curing guidelines are recommendations for ink deposit temperatures, not dryer temperatures.

  • 2-3 Minutes @ 160oC (320oF) 5-6 Minutes @ 140oC (285oF) 8-9 Minutes @ 120oC (250oF) Fastness.” 

While this gives most screen printers a basic guideline time and temperature wise, these guidelines don’t always work for every job.  We always suggest doing a test print before your main screen printing production.

Here’s what we’ve found to be more beneficial when screen printing with water-based inks:

  1. Lighter colored garments require a higher mesh count, since you will need less ink.  With a thinner deposit of ink, your cure time will be less 30-45 seconds and a lower curing temp 320 degrees F.
  2. Darker colored t-shirts will need more ink to create an opaque print.  You will also need a lower mesh count.  Cure temperatures will be around 375 degrees F for about 45-60 seconds.
  3. Ensure that the moisture escaping from the ink when cured is properly ventilated.  This is where a Ranar forced air dryer is a must!
  4. Once you find the correct temperature and curing time for your test print, use temperature strips to keep your printing productions all uniform.

We would like to hear about your curing times for water-based inks, or any tips that you’ve found to be helpful.  Leave us a comment. 🙂

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Los Angeles Trade Technical College for Sign Makers and Screen Printers

While Mclogan’s praises itself on being able to teach the “Average Joe” how to screen print and make signs there is another option for people wanting to learn this trade just a block away.  Los Angeles Trade Technical College offers screen printing as an elective in their Sign Graphic degree program.  The screen printing program is comprehensive and teaches students how to take their artwork and burn screens, all the way up to half-tone printing and 4 color process printing.

[New Screen Printing and Silk Screening classes Los Angeles enrollment now open. Pick your class today.]

Bert Johnson, a graphic designer, and art director who has been teaching and training students for over 30 years.  Every semester Johnson’s students are sent into Mclogan’s with a list of necessary screen printing tools.  Mclogan’s enjoys helping the new students get their required tools, while taking the time to further explain the screen printing process.

Bert Johnson 3

Above, Bert Johnson, shows a student how the clamp keeps the screen in place.  With the right amount of pressure on the squeegee as it’s pulled, leaving the student with a clean print.

Below are pictures of students working on their own individual assignments.

students

The class is meant to compliment the Sign Graphics curriculum and teach screen printing as a prospective business and not as a fine art. The class is structured to give students experience in creatively solving potential problems that might come up with client requirements. In addition to using water-based inks, students use plastisols and other solvent based inks. They are alsorequired to print on several substrates so they understand the diverse applications for screen printing in a print production setting.

printing

A student’s completed signs using Permaprint Red B/S. | Permaprint used in students’ poster project.

Permaprint Premium is a top selling waterbased ink for bright, eco friendly jobs.  It’s really such a versatile ink where you can almost print it on anything.
posters

Bryce Arpin prints on canvas. | The canvas is cut down and made into patches for bands.

Whether you are in school or just learning the business on your own, stop by Mclogan’s LA and we’ll help you with your next screen printing project.

Why Does the Plastisol Ink Crack on My Washed Garment?

“Plastisol ink is cracking when I wash my garments. Why?”

More than likely the plastisol has not been properly cured. Remember duration in the dryer is our friend. Many times printers maybe in a hurry, slow down. Most plastisol will cure when they reach a temperature of 320-330 degrees and sustain that temperature for 45 seconds to 1 minute. Some whites that have a fast cure designation will cure from 275-300 degrees and this will have to be sustained at 45 seconds to 1 minute. Make sure you check the technical data sheets for each ink line.

There are two tools out there that will help you make sure that the plastisol is curing at the right temperature.

  1. The most common would be the temperature strips. Thermolabels # 5 are the most common sold with a temperature threshold of 290-330 degrees. Each package comes with 16 strips and each strip can only be used once.
  2.  A little bit more expensive option would be a IR gun. When pointed at the print coming out of the dryer the IR gun will read the temperature of the garment on the LED screen.

 

If you have a question about your inks, or the printing process call us at 818-718-0888.

 

 

 

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Mclogan Chemical Kits

Water-based Chemical Kit

Water-based Chemical Kit

Now you can purchase all of your favorite Mclogan screen printing chemicals in the Mclogan Starter Chemical Kits.  Great for screen printers new to screen printing that are looking for the materials they need or for our experienced printers who know and love the Mclogan products.  Purchase by clicking here and let us know if you have any questions.


Plastisol Kit includes

All products are in quarts

  • Mclogan Degreaser
  • Chromaline newest emulsion Chromatech WR
  • Mclogan Textile Press Wash
  • Mclogan Emulsion Remover
  • Mclogan Liquid Haze Remover
  • Mclogan Pallet Adhesive
  • R-Tape 2000 Solvent Blue Tape
  • Scrub pad handle
  • 3 interchangeable scrub pads
  • Block out pen

Water-Based Textile Kit Includes

All products are in quarts

  • McLogan Degreaser
  • Chromaline newest emulsion Chromatech WR
  • Mclogan Graphic Press Wash (Water-Based ink cleaner)
  • Mclogan Emulsion Remover
  • Mclogan Liquid Haze Remover
  • Mclogan Pallet Adhesive
  • R-Tape 2000 Solvent Blue Tape
  • Scrub pad handle
  • 3 interchangeable scrub pads
  • Water-based Block out pen

Graphics Kit includes

All products are in quarts

  • McLogan Degreaser
  • Autosol Plus 7000 Emulsion
  • Mclogan Graphic Press Wash (Solvent or Water-Base ink cleaner)
  • Mclogan Emulsion Remover
  • Mclogan Liquid Haze Remover
  • Mclogan Pallet Adhesive
  • R-Tape 2000 Solvent Blue Tape
  • Scrub pad hande
  • 3 interchangeable scrub pads
  • Mclogan Green Blockout

 

 

 

Save Money with Mclogan Screen Printing Chemicals

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Why choose Mclogan Chemicals?

Mclogan Chemicals are bought in large quantities from the top manufacturers to ensure that our customers are getting the lowest possible prices, but still the highest quality products that they are used to.  In this blog we will highlight each chemical, how to use it and how these chemicals are the exact same as some of the brands you may be using.

  • Mclogan Screen Opener is the same product as the Sprayway 957 Instant Screen Opener; use this spray to unclog your screens.  This can happen when you screen print where your ink may begin to dry and get clogged in the mesh.  Some screen printers also use this product to clean their squeegees.
  • Mclogan Flash Adhesive (Super Flash Adhesive 384) when doing multiple color printing jobs flash adhesive is the best chemical to use when you flash your different colors.  Regular adhesive will start to break down during an 8-10 second flash, which can move your shirt and then the colors/image will not line up correctly.
  • Mclogan Spray Adhesive this is mainly for single color screen printing, or if you needed to secure your paper stock.
  • Mclogan Degreaser product made by CCI.  This is your FIRST step in screen printing to ensure that your screen is free of all grease before you put on your emulsion.  Emulsion will not stick to any type of oil or grease.  This degreaser is a concentrated liquid that will make 2 gallons per 1 gallon of degreaser.
  • Mclogan Emulsion Remover Concentrate product by CCI.  This is another concentrated liquid that will make 4 gallons per 1 gallon emulsion remover.  After you are done screen printing use this emulsion remover concentrate to remove your emulsion.  This will ensure that your screen is ready for it’s next job and application of the Mclogan Degreaser.
  • Mclogan Textile Press Wash this product is made by CCI as an eco friendly citrus smelling screen wash.  Prevent build up of plastisol inks on your screens with this wash, to ensure that you don’t stain your screen or get ghostlike images from your image print.
  • Mclogan Screen Wash (Fast Open 032 Water Based Screen Opener) Aerosol can used for a fast and easy clean up after screen printing with water based inks such as Mazdar 9500 Series, Matsui 301 Series and Permaset Inks.  You can not clean a screen with water that you’ve used for water based screen printing…it just doesn’t work.

Add these cost effective chemicals into your shops and let us know if you have any questions.

Article 2: How To Screen Print With 9500 Series Waterbase Additives

The additives discussed below are the screen printing waterbase additives for Nazdar’s 9500 Waterbase Series.  These additives help most screen printers who regularly print with the 9500 Series.  Read below to see what each additive has to offer to your next screen printing job.

AQ51 Prepared Extender Base is an additive that can be mixed (about 5% per weight to the 9500 inks) to increase the amount of screen printing waterbase ink.  When you over extend the ink by adding too much of the additive then your screen print will become too transparent.  Depending on the look of the garment adding more or less of this base will give the different characteristics to the print.

AQ53 Thickener is a liquid that increases the viscosity of the pigmented ink.  Add small 0.5% increments to reach desired thickness.  This additive will change the mesh count of some screen printing job.  However, if your garment has ink that has bleed through the mesh then adding this thickener would solve that problem.

AQ54 Aqualube is a gel that slows down the evaporation of water in your waterbase inks.  In dryer states the rate at which your ink will dry out is considerably more, unless the Aqualube additive is added.  When the ink dries on the screen it effects your image, and this additive helps to prevent that as well.  Add 5-10% by weight without worrying about over jelling the ink.=

AQ55 Softener is a product that will impart a silky, soft feel to the screen printed textile.  Add 2-5% when printing onto terry towels, which is a common screen printing job for this additive.

AQ56 Penetrant will help to aid in penetration to have a screen print on both sides of a textile (ex. golf towels).  This additive works best when added at a level of 2-5% by weight and will help to print on difficult garments such as looped/sheared terry cloth towels.  Note that the image of the print, where the ink was first in contact with the material will still be slightly brighter in color than the second image where the ink penetrated through.

To see where you can purchase these additives click here or call us today.

Large Format Vinyl Wrapping

Updating the look of your RV, truck or boat can be as easy as printing a new vinyl wrap and applying it.  Let your creativity go into full force as you design an image that can represent you and/or your business.  Here’s how to print on a large format printer and  how to vinyl wrap a large object (truck, houseboat, rv).

Roland SOLJET Pro 4 XR-640 is the best large format printer on the market!  This wide format (64 inch) plotter and cutter is precise, quick and efficient.  Offering the use of 8 different colors with 4 different color variations.  These large format prints are so vivid and offer up a “wow” factor unlike other printers.  This printer is perfect for banners, signs, decals, vehicles, boats, etc.

Here are the 4 different color variations that help make the prints look so real:

  • CMYKLcLm + Light Black
  • CMYKLcLm + White + Metallic
  • CMYKLcLm + Light Black + White
  • CMYKLcLm + Light Black + Metallic

Most people will design their large image in Photoshop Illustrator and then send it to Roland Versaworks Rip Program where you can then tweak your design as needed. You can adjust the ink amount that goes onto the vinyl, adjust the colors, or flip the image if you are printing on two sides of something.

When it comes to vinyl wrapping a large object you first want to take accurate measurements of whatever you plan on wrapping.  For this post we will be talking about a houseboat, so we took overall measurements, took some photos of the houseboat and took measurements of all the windows where there wouldn’t be any vinyl.  Some vehicles will have exact templets of the vehicle make and model that you get online, this doesn’t apply with a houseboat, but for other large vinyl jobs it is convenient.

Once you have your measurements and templet made then you can begin the design process in Photoshop Illustrator.  Adding in ghost images that overlap to create depth, business logos/brands, splatters, dripping ink pieces, shadows, themes… let your creativity run wild!   Then transfer your image to Versaworks and get ready to print.

If you are printing on Avery or Oracal you want to do a color profile to ensure that your colors print the way you intend for them to look.  Most people will pick a piece of their artwork to test print.  However, some vinyl printers do NOT do test prints unless there is a specific pantone color that they need to match for brand recognition (think of McDonald’s golden arches).

You can choose to print your image vertically or horizontally depending on the surface you are wrapping, how many people you have to helping you, and by the number of seams that you will want to have.

The picture below shows a houseboat being wrapped horizontally which look challenging, but they had enough guys helping to make it work.  Also their design was very detailed so it was probably a smarter choice for them to have just one seam to have to worry about lining up rather than 5 or 6.

When you get to the actual vinyl wrapping process you first want to clean and prep it.  Some people will detail their vehicles before, but for a houseboat you can spray and wipe down RapidPrep.  Once the surface is fully dry then you can begin to wrap.

If you are wrapping vertically then you would tape the middle, cut the backing off of the top and apply the top vinyl piece first.  Then you would apply the bottom piece.

If you are wrapping horizontally you would tape along the bottom edge, flip it down, peel off the backing and cut off the backing as close to your cut edge as possible.  Then flip it up and start squeegeeing from the middle out.  Using a wet edge squeegee with a wet application usually works best so that you don’t scratch the image.  You can get a Wet Edge Squeegee here and the Rapid Tac application fluid here.

Ducky Vinyl Wrap is the fluid to finish the job.  This will remove all the water spots, protect and enhance the shine of your nice new wrap!

Call us today for help on your next large format job.   IMG_2629

 

 

Off Contact Printing for Screen Printers

What is off contact screen printing?

In off contact screen printing you adjust the screen a bit above the platen, so that the only time the screen touches your garment is when you press the squeegee onto the mesh.  Some people don’t understand the importance of off contact screen printing, while others swear by the clean, flawless prints they get with this technique.  In a perfect world, off contact printing that is set correctly will allow the mesh to lift off of the shirt making for a cleaner print.

When adjusting the screen there are several different factors to take into consideration:

  1. Ink Viscosity; thicker inks will hold to mesh and not release onto your garment properly.  Here a tight screen and an open mesh, along with the proper off contact will really help out the printing process and save on ink.  An article talking about “High Density Printing” and overall ink viscosity is here.
  2. Mesh Count and Tension; having a tight mesh and the appropriate mesh count for your job makes printing so much easier.  You shouldn’t have to be overly concerned with off contact heights if you are using the appropriate screen and mesh.  Click here to read about “Choosing the Right Screen Printing Mesh”.  Click here to read about “Mesh Counts”.
  3. The Amount of Ink Used Per Print; the more ink you use the thicker your ink will be on your screen.  Most likely you will have a higher off contact than if you were to use less ink.
  4. Print Size; larger prints usually hold more ink and the mesh may rest on your garment so a higher off contact setting is preferred than if you were printing a smaller print.

Screen Shot 2013-05-28 at 7.56.10 PMFor all questions call us.  We’d love to hear from you!