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WATER MARK Printing in OFFSET

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  • #16
    The offset department of the company I work for do a lot of watermark printing. They have just finished 200,000 sheets for Mercedes Benz.
    The ink is made by Luminescence product code 1715KFD, its printed on the back of the sheet in reverse.
    I remember being told by management that we have to have a license for it as it can be used to forge documents etc.
    Attached Files
    Last edited by hojoclan; 12-12-2017, 11:34 AM.

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    • #17
      We live and learn !!!!


      Regards, Alois

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      • #18
        Originally posted by gordo View Post

        One more time: no.
        Apologize!

        Just kidding, I would have probably said the same thing.

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        • #19
          Originally posted by PricelineNegotiator View Post

          Apologize!

          Just kidding, I would have probably said the same thing.
          Happy to apologize. Love to see how it actually looks compared with a real watermark.

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          • #20
            Here is another offering, by a French Security Inks manufacturer:

            Watermark inks can be printed in offset, letterpress and flexography; they are used for printing a watermark which will give a certain transparency on a paper, not exceeding 90gsm. As those inks are rather oily, it is advisable to print them on the back side of the paper and to avoid overprinting them.

            The effect of transparency will be reach after a period of 24-48 hours, because ink needs that time for a complete migration through the paper. Consequently a coated paper cannot be used.

            Letterpress is the best printing process because the watermark ink is push inside of the paper. In addition to our standard version, our range includes fluorescent watermark inks, fluorescent in blue, green and yellow under UV lights. A watermark ink is also available for wet offset, but less efficient.

            Link:
            http://v2.petrel-security.com/en/pro...s-a-filigraner

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            • #21
              Interesting. It sounds as though, being an 'oily' ink that it will appear similar to if the paper had become wet - or oil stained - in the area of the watermark. Could be someone out there can turn this into a specialty business if they can supply custom 'watermarked' papers cheaper than special mill orders. On the other hand, the letterhead printing business seems to have dropped considerably since a lot of offices have their own colour copiers & printers.

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              • #22
                There is an instruction to avoid overprinting!!!

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                • #23
                  I got some suppliers who can supply Wet Offset inks, those are T&K Toka, Luminiscence, FX Pigments and many more. All are offering Wet Offset inks and printing is like conventional process. We tried one of the suppliers Wet Offset ink. When cleaned the unit thoroughly and applied the watermark ink. But when we printed it is showing like it was dried on the paper before penetrating into the paper. For the test purpose we applied ink directly onto the paper, then the ink penetrated into the paper and showing like watermark patch. But when we are printing with the ink that result is not coming. I observed the ink is drying before penetrates into the paper. We also tried without drier / hot air but the result is same. Any one can suggest what was the problem behind this.

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                  • #24
                    Originally posted by hojoclan View Post
                    The offset department of the company I work for do a lot of watermark printing. They have just finished 200,000 sheets for Mercedes Benz.
                    The ink is made by Luminescence product code 1715KFD, its printed on the back of the sheet in reverse.
                    I remember being told by management that we have to have a license for it as it can be used to forge documents etc.
                    Dear hojoclan, Thank you for your post. We tried with wet offset watermark ink but couldn't get the result in conventional offset printing. It its showing dried the ink on paper before penetrating into the paper. Could you please let me know the process

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                    • #25
                      I can't imagine that any type of printing will give you the desired effect quite like a Letterpress will. It may be a slow and somewhat inefficient process, but I don't think there's anything else comparable.

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                      • #26
                        Hi ponnapatil123

                        I've just spoke to the printer that did the last job and asked him, he said to run it like any normal ink, print a few and hang it on the window for 20 minutes to see what it looks like, take care not to over ink it as it can start to emulsify. Also paper stock is important as some papers don't take the ink as well as others and you start to loose the effect once you go over 100gsm, on some stock you can go to 120gsm. Get your rollers spotless.
                        The first client we used this ink for was Baker Tilly and the litho manager at the time spent a lot of work getting it just right as they were very fussy.
                        Last edited by hojoclan; 12-18-2017, 04:43 AM.

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                        • #27
                          Thanks Mr. Hojoclan. As I said we tried using the wet watermark offset ink as per normal procedure for printing. But I don't know ink density less or some other factors the clear ink looks like yellow shade. Then we tried in screen printing using 180 LPI screen, when we printed on the 80 GSM uncoated paepr the ink was clear and within few minutes ink is penetrated into the paper start showing like watermark effect. But the same ink when we applied in wet offset that result is not coming. In wet offset ink is completely drying on paper surface even we didn't use the drier or IR lamp.

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                          • #28
                            I wonder if you could get a watermark effect by a clever use of ghosting? You know that irritant that all good printers try to avoid like the plague.

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                            • #29
                              Hello ponnapati123


                              I suggest you print this "Fake Water Mark" by Letterpress, which gives greater Impression Force, allowing the Ink Vechicle to penetrate into the paper fibres.


                              Regards, Alois


                              1) Letterpress Inking I. F.T is 2/3 than Offset Litho Ink at normal S.I. D.

                              2) Screen Printing I. F. T is 5/6 than --- "-------
                              Last edited by Alois Senefelder; 12-19-2017, 11:41 AM.

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                              • #30
                                T&K Toka Japan have a nice watermark ink and they do have distributors in the USA

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