Technical Tips on Screen Printing by Bhargav Mistry, DMI – #2

March 9, 2017 4 comments

Q – Important points about screen making room?

  • First of all you need proper screen making room with yellow safe lights
  • Do not allow outside footwear in the room
  • Do not keep any windows in the screen making room
  • Avoid outside light to enter in screen making room
  • Screens should not be made in dusty open area with bright daylight
  • Maintain room temperature around 20℃ to 23℃
  • Maintain consistent humidity around 55 to max 60 RH
  • Clean flooring with vacuum cleaner twice a day
  • Use anti-static clothes in the screen making room
  • Use anti-static gloves where ever possible plus to avoid contact of hand/fingers on screen mesh
  • Use anti-static brush or anti-static soft cloth to clean your positives and screens before coating emulsions
  • Use high quality emulsion coating trough
  • Use double door system to enter in screen making department to avoid outside lights
  • Do not wash screens inside the screen making room
  • Screen washing should be outside the screen making room but just adjoining to avoid hardening on unexposed areas
  • Screen washing should also be under yellow lights
  • Only keep Exposing Machine, Emulsion Coating Machine or Manual Coaters & Screen Dryers in the room.
  • Positive storage, artwork, designing etc. should not be in the screen making room
  • Do not have overhead fans in the screen making room to avoid dust particle circulation
  • Keep machines, tables etc 2 feet aways from the walls so that cleaning of dust within the room becomes easy

Pictures shown below are of our screen making department at DMI… Each room has proper safe yellow lights, no windows and fully air-conditioned with clean flooring.

I will soon post different layouts of a typical screen making department and how should be the optimum area required for easy movement of screen frames.

Always remember screen is the heart of printing, good quality screen delivers good quality prints. But to achieve good quality screens you also need modern & high class screen making department. That’s the most essential.

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Technical Tips on Screen Printing by Michel Caza – #1

March 8, 2017 4 comments

Bhargav-MichelCazaToday I will be posting my first Technical Tips. As my I have written dozens of technical articles on my blog but this new concept is designed to provide short and quick technical informations on screen printing technology.

Since it’s my first post, so I requested my GURU Michel Caza to kick start by posting one short technical tips.

Yesterday evening I requested him to send me few technical articles & tips so that I shall keep you posting one by one.

He was quite helpful to send me one quick article on Screen Making but there are many more to come from us and also from many other technocrats of this industry.

This is just a beginning, you will see many in-depth articles, tips, videos, visual to learn every day with many new innovative ideas.


Q – The small dots and fine lines printed disappear on the screen after stencilling?

Dots and lines too fine on the film
Respect the indications about the maximum possible fineness to reproduce

Dots and lines not black enough on the film
This can happen with films made by inkjet, not dark enough.
The sharpness, resolution, edge definition of the film must be perfect.

Colour of the screen mesh
Always use yellow mesh, avoid white mesh, to prevent light dispersion in the thread

Too coarse fabric or/and too large thread diameter
This prevent to print fine lines or dot : use S or T, thread diameter of 27 to 31 microns
in 120 to 165 thread/cm, plain wave (PW) if possible

Improper emulsion sensibility for fine lines definition and resolution
Choose a good emulsion, diazo (SBQ) or better, diazo polymer (wide latitude when exposing) with high amount of solid content.

Too many emulsion coats
As it must be exposed more, this causes the closing of the fines lines and dots.

Over exposure of the screen
Even with a correct coating of emulsion (1 coat, 1 + 1, or 2 + 1 maximum), respect the indication given by the Exposure Calculator.

Handling of screen under Improper light.
When the emulsion is dry, before and after exposure and beginning of developing with water, it is sensible to the light and can then be hardened, partially or totally. Then use yellow light in stencil room. When wetted on both sides of the screen , the white light can be used.

Poor contact in the exposing unit
To prevent any dispersion of the UV light during the exposure the contact between film and screen must be perfect. Check your vacuum pump or the rubber carpet quality which must be clean and without holes. Use a thread to the screen frame to permit a better drainage of the air.

Use of “UV tubes” light
I do not advise this because the UV light is not punctual enough and the dispersed light is not able to stencil properly line and dots under 100 microns. For fine lines, use a metal halide lamp.

No “light integrator”
Take care of exposure “time” which can drastically change during the day with the variations of supplied electricity. Use a light integrator which automatically measure and supplies the exact “amount of light” needed

Poor development of the screen.
If some emulsion remains in the finest lines or dot that should be totally open, those will be closed and of course impossible to print.

All the best from;

Michel Caza

NOTE: Kindly rate each post and also send your comments to help us improve on contents and topics.

International Women’s Day – 8th March Employ and Empower Women in Printing​

I am proud to say that nobody in our screen printing industry have ever tried to highlight the achievements of women in printing, as much as we do through our Grafica News India magazine.

This issue features Women who are into teaching print technology, women entrepreneurs, women who have joined their family business after marriage, and women who work in printing presses while back home they take care of their families.

So, on the occasion of International Women’s Day celebrations on 8th March, I admire and salute all Women Entrepreneurs; women working in printing, for their courage.

I would appreciate your comments on this issue.

Bhargav Mistry

Click on the image below to download
“Women’s Day Special Issue – A must read for all Women in Printing Industry”

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Technical Tips, Q&A, Ideas & Hints on Screen Printing by Bhargav Mistry, DMI

March 7, 2017 25 comments

Dear Friends,

After lots of feedback from GRAFICA customers and DMI workshop participants requesting me to post technical tips on screen printing on my blog ( www.bhargav.com ) related to Graphics, Industrial, Textile, Value Addition and many other areas where screen printing play a vital role.

So today, I am please to announce that after several years of my research & development in screen printing I shall soon be posting short Technical Tips, Q&A, Videos & Visual related to screen making, screen printing, UV/solvent inks & varnishes, screen emulsions and chemicals, drying and curing, ideas and concepts on special effects, production & productivity improvement tips and much more…

If you do not want to miss any of my technical tips then on the right side of my blog you will see “Email Subscription Form” where you can enter your email id and click on “Sign me up!” to receive automatic alerts in your Inbox regularly. (Refer to the image given below)

If you also wish to receive technical updates, DMI Workshop & Seminars Schedule and other technical information related to screen printing then send us an SMS form your mobile phones to the following number:

+91 92 932 92 932
and type in your message board
GRAFICA START
(Currently this facility is only available within India)

DMI

It’s my privilege to announce that many International Experts have also shown their keen interest to support the screen printing community. So very soon many experts will also post their ideas and technical tips which will further sharpen your knowledge & skills in screen printing.

Do not forget to rate each Technical Tips and make sure you post your comments and feedbacks in order to serve you better.

All the best and good luck.

Bhargav Mistry
DMI
Learn More | Earn More

DMI-T-STOCK Designs, Ready-To-Print Designs for T-Shirt & Garment Printers

June 19, 2016 4 comments

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Over the years, we have been making constant efforts to support garment printers at large with innovative ideas and concepts, from design to printing. Now I am pleased to announce the launch of ‘DMI-T-Stock Designs’, which is a collection of ready-to-use designs for t-shirt printing.

DMI-T-Stocks Designs is a unique concept initiated by DMI to extend our full support to textile screen printers across the globe.

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DMI-T-Stock now has over 150,000 exclusive design collection suitable for screen, digital, or sublimation printing processes and are also suitable for all ages and gender (men, women, kids, boys & girls), and for all-over printing. Plus thousands of latest designs and concepts are added in our library on regularly basis.

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DMI-T-Stock Designs come with high resolution images and separate layers so that you can later modify these designs as per your needs.

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DMI-T-Stock Designs are available with the following options:

1) Designs with Layers or Composite in RGB Format

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2) Designs with CMY + Grey & Black with Under base White & Highlight White in EPS, TIFF or PSD format

Rowing-League-Seps

3) Designs with SPOT process separation with Under base White & Highlight White in EPS, TIFF or PSD format

Camera-SepsOld-Times-Seps

4) Designs with CMY + Grey & Black or SPOT process separation with Under base White & Highlight White in 1 Bit PDF format, ready for positive output

1 Bit PDF

5) Designs with CMY + Grey & Black or SPOT process separation with Under base White & Highlight White supplied with positive

At DMI, we use very high end colour management and separation software, and use the World’s most powerful RIPs (Raster Imaging Processor) to output positives.

Apart from our DMI-T-Stock Designs, we also undertake jobs to make high end separations of your own designs and if required we also provide files of those separations in 1 Bit PDF format ready for positive output or we can also supply positives ready to print.

All our separation includes few separate channels to print special effects or we can even make separation to print special effects based on your requirements and criteria.

With our separation techniques and by using 2nd generation FM Screening your ink consumption can reduce by almost 25% to 40% in some cases. Plus this method also delivers brighter colours with moire free prints.

FM_Screening-1FM_Screening-4

We can also provide 1 Bit PDF files ready for positive output or ready positives with conventional AM Screening i.e. 45, 55, 65, 85 LPI or as per your requirements.

Our separation mainly works with basic 14 Pantone colour technique. This reduces wastage and avoids stocks of special matching colours. An added advantage to increases your profitability.

Matsui-Pantone-Colour-Chart-301_RC-1

Also, as you all agree with me that today to get experienced and creative graphics designer is a biggest challenge. When you employ a graphic designer, he can only give you one type of idea, concepts and taste.

So, the best part when you take designs from DMI-T-Stock is that you have the chance to get different ideas, innovations, themes, and concepts, since these designs are collected from various renowned artist & designers globally.

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To create DMI-T-Stock Designs, DMI has collaborated with some of the World’s best and experienced artist and graphic designers, with varied interests and thinking, who are known for their creativity and passion.

These designers keep sending us their innovative ideas, designs and concepts best suited to meet the taste of the customers worldwide.

We collaborated with designers from countries such as US, UK, Russia, Turkey, Italy, France, Spain, China, Korea, Thailand and India, who send their new designs for DMI-T-Stock collection.

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Plus DMI is also constantly sourcing new designs, ideas and concepts from experts in the industry so that you get varieties and options when it comes to selecting designs.

With DMI-T-Stock Designs you can save your precious time because we want you to print more and concentrate on your printing business rather than struggling for designs, ideas and concepts.

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Leave your tasks on us, whether it is Design, separation, pre-press or positive making. Because all this comes with DMI team’s 10 years of vast and rich experience in the field of screen printing backed by my own experience of over 25 years in advanced screen printing (since 1989!).

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For further information call – DMI’s TECHNICAL HELPLINE no.+91 8 655 755 855

Or write to us at: dtg@graficaindia.com

Meanwhile, happy screen printing…

Bhargav Mistry

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Learn FM Screening to get Moire Free Prints & Achieve Digital Like Quality by Screen Printing

DMI_Workshop_20150824-80

In all my future workshops at DMI on textile screen printing you can now learn in depth about high definition screen printing process using 2nd Generation FM Screening technique to print DIGITAL like quality by SCREEN PRINTING process.

DMI is the first and only institute in the WORLD teaching latest and advance screen printing process in graphics and textile field and demonstrating the state of art high definition screen printing on textile using 2nd generation FM screening live and practical for free.

DMI is the only institute in the world teaching, graphics, industrial, print finishing, value addition and textile screen printing for free under one roof.

In all my workshops I teach right from designing to pre-press to colour management to screen making, screen printing, post-press live and practical all three days.

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Left Side Image (AM Screening) – Right Side Image (2nd Generation FM Screening)

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On 5th June 2015 during our grand re-opening of DMI institute in our new premises. I had made a statement in front of 100’s of printers who were present there, that “Once upon a time there was a moire problem in screen printing… what I meant was that moire will be a history in screen printing industry from now onwards. Yes at DMI we successfully implemented it and have also started conducting workshops and training programs on this subject.

So, MOIRE is no more a problem in screen printing with 2nd Generation FM Screening Technique.

After years of research and development in screen printing at DMI I have completely discarded AM screening in all my courses. Now I am only focusing on 2nd Generation FM Screening techniques which produces digital like quality through traditional screen printing process in graphics and textiles.

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Moreover the advantage of using 2nd generation FM screening is to avoid moire in screen printing. Especially when printing halftones on garment it becomes very difficult to control moire even after using coarser halftone dots like 45 LPI.

2nd generation FM screening totally eliminates moire in screen printing thus delivers sharp, crispy and brighter images. Even finer and smaller details are clearly visible.

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Left Side Image (AM Screening) – Right Side Image (2nd Generation FM Screening)

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To take one step further in the implementation of the 2nd generation FM screening in your company. I have made some test files which you can download and print at your end to check and compare the results of 2nd Generation FM screening vs conventional AM screening.

Email to: dtg@graficaindia.com or call us on our helpline number +91 8 655 755 855 so that we can send you the link to download DMI’s complete “Step-By-Step Instruction Guide”. This guide also explains how to print 2nd generation FM Screening to produce digital like quality through screen printing process.

Along with the instruction guide I have included many TEST FILES in PDF Format ready for positive output on any imagesetter. So once you download the test files, you can again call us on our helpline number for further guidance.

At DMI, Learn More – Earn More and be innovative.

Bhargav Mistry

Helpline Number for Screen Printers

June 15, 2016 2 comments

DMI_Workshop_20150825-182

It gives me immense pleasure to announce that screen printers across the globe can now call on this special HELPLINE Number for any kind of technical support related to screen printing process.

 

+91 8 655 755 855

 

Timing : 12.00 pm ~ 1.00 pm and 4.00 pm ~ 5.00 pm (IST), Monday to Thursday

DMI’s technical team including me will try to solve your problems well within DMI’s scope.

As you know DMI is connected to many international experts in screen printing. So, if your problem is not solved within our scope, we will also try to get solutions from international experts associated with DMI.

I am sure this HELPLINE facility will enable screen printers to improve quality standards and resolve day to day problems.

Have a trouble free screen printing…

Bhargav Mistry

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