Page 1 of 3 123 LastLast
Results 1 to 10 of 21
  1. #1
    eric@associatedprinting is offline Junior Member
    Join Date
    Jan 2008
    Location
    Rutherfordton, NC
    Posts
    2

    Default How to tell the difference between UV & Aqueous

    Does anyone know how to tell whether a printed piece has been aqueous coated or UV? The piece I have does not look super smooth but the customer doesn't know how it was printed.

  2. #2
    jlind is offline Senior Member
    Join Date
    Sep 2007
    Posts
    265

    Default Re: How to tell the difference between UV & Aqueous

    Eric:
    If it's water based, you can dissolve it away with an ammonia solution, like Windex? If it's UV, try a tape pull, see if it comes away clean from the surface. UV is more slippery, from silicones. Another thought, a ball point pen should write on an aqueous coating (same as Indigo Sapphire...) but not on UV.
    John Lind
    Cranberry Township, PA
    724-776-4718

  3. #3
    UVMAN is offline Junior Member
    Join Date
    Jan 2008
    Posts
    2

    Default Re: How to tell the difference between UV & Aqueous

    In my experience AQ even at a high gloss will still have a MATTE TYPE OF look. UV on the other hand should have a very nice high gloss. although there are different types of UV if the sheet came from an offset press chances are it 's AQ. and if it's a digital press chances are it can from a UV Roller type of coater Like my XTRA Cure UV Coater.
    please fill free to call for more help.

  4. #4
    bearwithme is offline Junior Member
    Join Date
    Jan 2008
    Posts
    2

    Default Re: How to tell the difference between UV & Aqueous

    Not to throw a wrench in the works but...
    We print UV litho on plastic. You can certainly get matte uv coating, writeable uv coating, and gloss uv coating. The writing test may not work if it has writeable uv coating on it.

  5. #5
    tmason is offline Member
    Join Date
    Apr 2008
    Posts
    67

    Default Re: How to tell the difference between UV & Aqueous

    Try smelling it. UV has a distinct odor.

  6. #6
    arfamoe's Avatar
    arfamoe is offline Member
    Join Date
    Oct 2007
    Location
    UK
    Posts
    79

    Default

    Use a regular felt tip marker (not a sharpie) and draw a line on the coating, if the coating is UV the felt ink will 'Bead' and not stick, if its waterbase the line will stick to the coating.

  7. #7
    Join Date
    Nov 2008
    Location
    Richmond,BC
    Posts
    99

    Default Not always, but..

    I will agree with bearwithme! The writing test no longer applies 100%. Now, having said that, it is definately one test you can do. Not all UV coatings are writeable, and more often than not, those are special uses. So if a jiffy or pen cannot write on it, then it is UV. Smell test is also good, if you know what you should smell! Typically, UV gloss coating will be very shiny!

  8. #8
    Cedarman is offline Junior Member
    Join Date
    Apr 2010
    Posts
    4

    Default Determining if UV coated

    Folks,

    I'm new here so excuse mistakes or indiscretions. I need your expertise.

    My company makes household products out of aromatic eastern red cedar wood (hangers, blocks, balls, sachets, etc.).

    The relevant point is that we always apply a UV coating to our packaging in the area where the wood will touch the printed cards (e.g, blister cards). Otherwise the natural oils in the wood will cause the underlying inks to bleed all over and ruin the package and product.

    We have done this for years and never have problems.

    Recently a large customer of ours (nationwide retail chain) required us to use a non-U.S. printer for some blister cards. The cards looked okay, UV coated area was appropriately glossy.

    However, after packaging product we have found that the "UV coated" area under the cedar wood became very wrinkled and 'orange peel' looking. The ink has not bled so far, just the orange peel effect.

    Does anyone have any idea why this might have happened? We have never had anything like this in the past.

    Is there a simple test I can perform on the supposed UV coated area that will tell me if this is a true UV coating?

    I tried the felt tip test and it does bead up on the UV surface. Also tried ball point pen and it wrote on the UV surface.

    Are there different types of UV coating that might account for this?

    Any help/suggestions would be greatly appreciated.

    Thanks in advance

  9. #9
    Cornishpastythighs is offline Senior Member
    Join Date
    Oct 2009
    Location
    Deans Bottom, Kent, UK
    Posts
    534

    Default

    I would imagine there are hundreds of UV coatings of different levels of quality out in the market place. The felt marker test is a good cheap basic test that has its exceptions, some UV coatings are classed as foil stampable/imprintable these coatings have certain ingredients removed to allow the foil to stick to the coating and can be wrote on. If I read this correct, you used to apply the UV coating yourself or at least had some form of control over the process, now you have no control and have no idea of the quality or application process of the problem coating. Time to visit your 'new' supplier if they are not 10K miles away and put in some quality specifications, Its your reputation hanging on the shelves mate.

  10. #10
    Vee
    Vee is offline Senior Member
    Join Date
    Aug 2007
    Posts
    221

    Default

    Quote Originally Posted by Cornishpastythighs View Post
    Time to visit your 'new' supplier if they are not 10K miles away and put in some quality specifications, Its your reputation hanging on the shelves mate.
    Well said. Even if they are 10k miles away, you need to check them out; and clearly communicate your expectations.


Page 1 of 3 123 LastLast

Similar Threads

  1. Density difference gripper to tail
    By Prepper in forum Sheetfed/Web Offset Discussion
    Replies: 24
    Last Post: 10-21-2010, 07:42 PM
  2. Aqueous Coating Problems
    By TonyF in forum Ink, Substrates, and Consumables Discussion
    Replies: 6
    Last Post: 06-09-2009, 08:07 AM
  3. aqueous coatings
    By richck in forum Ink, Substrates, and Consumables Discussion
    Replies: 5
    Last Post: 08-13-2008, 12:44 PM
  4. Difference Between Photography vs Proofing Rips
    By Tech in forum Color Management
    Replies: 7
    Last Post: 04-14-2008, 08:29 AM
  5. Delta e difference
    By Paultheprinter in forum Color Management
    Replies: 3
    Last Post: 01-17-2008, 09:02 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Sponsors

Powered by vBadvanced CMPS v4.1.2