5 STEPS FOR A PERFECTLY RECLAIMED SCREEN

The rule is – let the chemicals work for you, not you work for the chemicals!

  1. Remove as much printing ink as possible using a plastic or Stainless Steel spatula. Remove any tape.
  2. Apply a solution of De-coat Powder to both sides of the screen mesh with a small sponge. Check the packet for the mixing instructions. Leave for 3 – 5 minutes to allow the chemical to do the work. Do not allow the chemical solution to dry on the screen. Now blast the photo emulsion off with a High Pressure Spray Gun from both sides. Photo emulsion may be hiding behind the mesh strand.
  3. Now using a combination of K4 Ghost Image Remover and Cleaner Paste, apply chemicals to to both sides of the screen mesh. A small cloth is recommended. Remember to wear quality Chemical Gloves as the chemicals are strong and caustic. Leave for 5 – 10 minutes to allow time for the chemical to do the work. Blast with a High Pressure Spray Gun from both sides. At this stage of the cleaning process there should be no evidence of the previous print. Repeat the K4 + Cleaner Paste combination, if necessary.
  4. The last step is to neutralise the cleaning chemicals using a Degreaser Solution. Use a small cloth. Remember to degrease both sides of the screen mesh and all sides of the screen frame (as the very chemicals that break down the photo emulsion is hiding on the frame!). Rinse off with a hose pipe + spray.
  5. Store in a dust free environment until required for coating for the next job.
  6. Contact Keip Bros on +27 0 11 835-3129 #keipbros

 

 


 

NEWSPAPER IS YOUR FRIEND WHEN CLEANING INK OFF A SCREEN!

Cleaning is a messy job – make it as painless as possible!

  1. Remove as much ink off the screen with a Stainless Steel or plastic spatula. The more ink you remove at this stage the quicker/less cleaning time you will need to spend.
  2. Place layers of newspaper under the screen. Now using a small sponge (for water-based inks) or a small cloth (for solvent-based inks) – wash / rub the screen from inside the frame: left to right / top to bottom, for a long time. The diluted ink solution will soak into the layers of newspaper.
  3. Remove the top layer of the newspaper and continue the cleaning-up process in Step 2.
  4. Now lift the screen and using a clean new sponge or cloth, dab the underside of the screen. Do not rub the underside as this side is your definition side.
  5. Repeat the clean-up process until the screen mesh and frame is 100% clean and free of ink.
  6. Contact Keip Bros on +27 0 11 835-3129 #keipbros

 

 


 

FLOOD-COATING A SCREEN IS LIKE “ICING A CAKE”!

… the thicker the icing, the longer the cake will remain moist!

  1. When printing with water-based or solvent-based air-dry or catalysed inks it is very important to flood-coat the screen immediately after each print to avoid the image blocking up.
  2. Remember to place enough ink on the screen to achieve an “icing sugar thickness” of ink over the entire open image area on the screen. That is much more ink than you think!.
  3. Use the squeegee (or flood-coat bar on a pneumatic machine) to flood-coat the screen by rolling back the volume of ink, holding the squeegee 1 – 2 mm above the mesh. The gap = the thickness of the flood-coat.
  4. Ruling #1: The hotter the print-room studio the thicker the flood-coat needs to be to avoid ink drying in the open image between prints.
  5. Ruling #2: Opaque textile water-based inks need a thicker flood-coat than any other printing inks.
  6. Think of it this way – the thicker the icing on a cake the longer that cake will remain moist!
  7. Contact Keip Bros on +27 0 11 835-3129 #keipbros

 

 


 

MIXING TEXTILE WATER-BASED INK IS AS EASY AS ADDING SUGAR TO COFFEE!

… but don’t forget to write down the recipe for future colour matching!

  1. Clear water-based Base + Pigment = textile printing ink for white or light colour fabrics.
  2. Opaque water-base Base + Pigment = textile printing ink for colour or dark fabrics.
  3. The mixing ratio for Clear Base (Clear Extender) + 3%. Example: 970 g Clear Base + 30 g Pigment = 1000 g or 1 kilogram of primary colour ink for printing on light colour fabric.
  4. The mixing ratio for Opaque Base + 6%. Example: 940 g Clear Base + 60 g Pigment = 1000 g or 1 kilogram of primary colour ink for coloured or dark fabric. More pigment may be required (taking it up to a maximum of 9 % pigment) on some colours.
  5. Always test the colour on the fabric by printing through a screen of the correct mesh count.
  6. Ruling: the lower the mesh count the more ink deposit = better opacity on an absorbent fabric.
  7. Add 2 – 5 % Fixative if the fabric is made with a percentage of polyester.
  8. Check the curing instructions and always do a wash test to make sure you are getting a perfectly cured print on a T-shirt. The onus rests on you, the printer!
  9. Remember: Always write the mixing recipe / ratios on the lid AND in a recipe book for future mixing of the same colour for a repeat order. Batch numbers are also very useful.
  10. Don’t forget to put on a mixing date as printing inks do have a shelf life!
  11. Contact Keip Bros on +27 0 11 835-3129 #keipbros

 

 


 

PAD PRINTING GOES WHERE SCREEN PRINTING CAN’T!

  1. Pad Printing, formerly known as Tampon Printing, is ideal for printing on products with irregular shapes. A great example is a golf ball with dimples!
  2. Pads come in different sizes, shapes and hardness to print the job.
  3. A “soft” pad is ideal then you need to wrap around a product (cylindrical) or get into recesses (such as dimples on a golf ball).
  4. All pads need a curve or radius as this will expel the air and avoid a vacuum from forming. If the pad is too flat you will create an effect like standing on chewing gum, stepping off it and creating strands from the floor to your shoe.
  5. There is a huge range of pad printing inks + hardeners + reducers to print on different surface and substrates.
  6. Ideal for printing promotional items, stationery, corporate gifts and dinnerware such as mugs, shot glasses and drinking glasses.
  7. Generally, pad printing is for small areas of print such as branding or decoration.
  8. Contact Keip Bros on +27 0 11 835-3129 #keipbros

 

 


 

A GOOD ARTWORK POSITIVE MAKES A GOOD SCREEN. A GOOD SCREEN STENCIL MAKES A GOOD PRINT!

Remember: You make one positive and one screen - but use that screen for 100 + prints. Make it easy for those 100 + prints!

  1. The quality of your print is dependent of the quality (sharpness) of your artwork positive. A bad positive = a bad screen stencil.
  2. Check your resolution of the file. An image off the Internet at 56KB and then enlarged to an A4 will be so pixelated that it will have to be redrawn first. Remember – a good artwork positive makes a good print!
  3. Your artwork positives must to be 100% black to stop the light when exposing a screen. If using a laser printer + Laser Film – always enhance the positive with Laser Enhancer Liquid to “pump up” the opacity of the black solid and glossy. Remember – a good positive makes a good print. A partly grey positive with allow light through and “fog” the screen in places.
  4. An original laser toner is recommended as the toner powder is just that much better.
  5. Remember to turn your “toner saver” off as you want graphic quality / high toner deposit on the Laser Film.
  6. Positives can also be cut with a vinyl cutter + Rubylith film, drawn with ink on drafting film or silkscreen positives from a Repro house using photographic film & chemicals.
  7. Check the size of the halftone dots! When playing out a positive with halftones – choose a dot size that will transfer and print successfully onto the substrate. Example: a 45 lpi is ideal when printing a T-shirt with water-based inks using a 61 yellow mesh screen.
  8. Contact Keip Bros on +27 0 11 835-3129 #keipbros

 

 


 

HOW MANY COLOURS DO YOU WANT TO PRINT ON A T-SHIRT? YOU WILL NEED A CAROUSEL (rotating) SCREEN PRINTER TO PRINT 2 OR MORE COLOURS.

  1. Printing two or more colours on a T-shirt or fabric requires a carousel screen printer.
  2. You will need a screen, squeegee and ink per colour.
  3. You cannot register fabric in the same place for the next colour as the fabric will stretch / distort and be out of alignment if you remove it off the board.
  4. Remember that you need to use Board Glue / table adhesive / permanently tacky glue on the T-shirt board / pallet to hold the T-shirt fabric in place during the entire printing process.
  5. Add more Board Glue when necessary as the “fluff” off the fabric will make the glue less tacky / weak.
  6. Apply a thin layer of Board Glue with a spatula or credit card. Take off any high spots. Dry the glue until it is ‘permanently tacky”. You do not want the glue to come off in the inside of the T-shirt.
  7. Contact Keip Bros on +27 0 11 835-3129 #keipbros

 

 


 

WATER-BASED INK VS. PLASTISOL TEXTILE PRINTING INK

  1. There are two popular types of direct textile screen printing inks: Water-based and Plastisol inks.
  2. Water-based inks are cheap, easy to mix a Pantone colour, easy to clean up and easy to cure.
  3. Plastisol inks are more expensive, Pantone colours can be matched, take longer to clean up with Screenwash and cure quicker at a lower temperature.
  4. Decide which ink will give you the best result for the print job.
  5. Some people prefer water-based inks as they “stain” the fabric making it more durable when soaking overnight in detergent, hand rubbing the fabric together, hanging it out in the African sun for the whole day – the African way!
  6. Plastisol inks are great for fashion prints especially on dark fabric as Plastisol inks have high opacity / solid colours.
  7. Plastisol inks have a wide variety of speciality colours and special effects such a Puff, Metallic, High Gloss Clear, Pearlescent and Discharge (to name but a few).
  8. Contact Keip Bros on +27 0 11 835-3129 #keipbros

 


 

PRINTING EQUIPMENT FOR AFRICA!

  1. Keip Bros. Trading Company can arrange delivery anywhere in South Africa and exports throughout Sub-Sahara Africa and Indian Ocean Islands, using our trusted couriers and freight forwarders.
  2. Kargo National has depots in Johannesburg, Bloemfontein, Cape Town, Durban, East London, Nelspruit, Polokwane and Port Elizabeth servicing all the South African provinces: Gauteng, Mpumalanga, Northwest, Limpopo, Northern Cape, Western Cape, Eastern Cape, Kwa Zulu-Natal and the Free State. Special arrangements can be made for our bordering countries including Swaziland, Lesotho, Namibia, Botswana, Zimbabwe, Mozambique and further countries like Zambia, Malawi and Tanzania.
  3. Parcels sent at the buyers cost and insurance is optional.
  4. Call for a quote or email your wish list of equipment, supplies and consumables.
  5. Contact Keip Bros on +27 0 11 835-3129 #keipbros