Test image and result of evaluations of different coating binders on a variety of Indian papers and paperboards Images Kiran Prayagi
Test image and results of different coating binders on a variety of Indian paper and paperboards Images Kiran Prayagi

Different batches of coated papers of the same type and GSM from the same paper mill can show differences in printability with the changes in coating formulation. This work studies the papers and paperboards from a few paper and paperboard mills.

Different types of latex binders were tried in pre-coat and top-coat in paper manufacturing. A specially designed ‘print test forme’ was printed under production conditions in the same print run on a Heidelberg CD 102 sheetfed offset press using CtP plates and 4-color Huber Micro Inks Perfektion F series process inks. During the same run each type of paper was first printed with the correct ink-water balance and then with the dampening solution feed increased to 100% to study its effect on printability.

To realise the objectives and the research methods mentioned above a list of was drawn up as follows. A special test forme, see figure 1, was designed to study all the parameters.

Important parameters from the printers’ point of view –

Print density, Dot gain, Print contrast, Trapping in multicolor printing, Hue error, Grey error, Gloss, Lab values, Delta E on different papers, Mottling, and Set-off.

Important laboratory tests –

IGT dry pick, Stain length, Paper gloss, Print gloss, Delta gloss, Brightness, K & N, Set-off, Mottle index papers

Print Production Trials

Test image and result of evaluations of different coating binders on a variety of Indian paper and paperboards Images Kiran Prayagi
Test image and result of evaluations of different coating binders on a variety of Indian paper and paperboards
Images Kiran Prayagi

Laboratory Tests

Screen Shot 2022 Web700.29
Laboratory tests

Laboratory test parameters

Print performance inference through laboratory tests and production print trials

1. Print density trend in laboratory evaluation matches print production trials.

2. Density trend in porometric test is also reproduced in print production densities.

3. Back trap mottle (BTM) trend in laboratory is found to be in line with print mottle in print production.

4. Water interference mottle (WIM) in laboratory is found to be in line with print mottle rating of print production trials.

5. Set off density trend for SBR products are in line with mottling index for the production printed sheets. Lower set off values gives lower mottling tendencies.

Papers and paperboards for the investigations were kindly supplied by BILT, JK, ITC, NR Agarwal, Gayatri, Balakrishna mills. Huber Micro Inks supplied the inks and Jasmine Art Printers, Mumbai allowed the carrying out of all print production trials. Laboratory tests were conducted at Apcotex Industries, Mumbai.

Packaging South Asia — authentic, impactful and influential

An English-language packaging industry B2B platform in print and web, Packaging South Asia is in its 19th year of publication. We do not make any claims about being the best or the most widely read. However, if you are interested in targeting the Indian and South Asian markets to sell equipment, technology, software, and consumables, we can help.

To improve your marketing and grow sales, talk to us. Our research and consulting company IppStar [www.ippstar.org] can assess your potential and addressable markets in light of the competition. We can discuss marketing, communication, and sales strategies for market entry and growth.

Suppliers and service providers with a strategy and budget for targeted marketing can discuss using our hybrid print, web, video, and social media channels to create brand recognition linked to market relevance. Our platform and channels are differentiated by hands-on practice and an understanding of business and financials. Our team, including some of the best technical writers, is ready to meet you and your customers for content.

India and South Asia’s fast-growing packaging industry is continuously expanding capacities with efficiency and appropriate innovative technologies. Get our 2025 media kit and recalibrate your role in this dynamic market. Enhance your visibility and relevance to existing markets and turn potential customers into conversations. Ask for a sample copy of our monthly or two weekly packaging eZines.

For editorial info@ippgroup.in — for advertisement ads1@ippgroup.in and for subscriptions subscription@ippgroup.in

Naresh Khanna – 21 January 2025

Subscribe Now
unnamed 1

NEWSLETTER

Subscribe to our Newsletter

LEAVE A REPLY

Please enter your comment!
Please enter your name here