• Do you have to project onto the glass or it is just glass window(door) where the projection would be?

    Few things come to mind right away. I would use film/tape that adds semi-transparent surface to the glass and illuminates on projector light. This tape can be made(cut) into shapes itself to create dimensional effect. Or just add a projection surface onto the glass pane. I have used black projection vinyl? very effectively.
  • Izzy Guru

    Thanks @JJHP3 and @vanakaru 

    The glass still needs to be see through, or as best as possible.
    I have found a very expensive way but little documentation about electronic fibers or something in glass that make the window non-transparent but its super mega omg expensive. Very cool though. A decent example here called 'Smart Film';
    http://www.youtube.com/watch?v=LnWVx1s9Vj4
    I actually think the best way is to frost the glass; but id need to experiment with finding how much or less frosted it needs to be.
  • Izzy Guru

    Another (from 2008!)

    http://www.youtube.com/watch?v=XMp6iTAHfBU

  • Look at the various density tape/films add printers may have. Also you could use the technique they use for advertising on public transportation. You cut the film into a net of small holes or stripes thus allowing good amount of transparency and density at the same time.

    If you go with physical work to glass surface use acid(etching) not sandblasting. You get better transparency with enough projection surface density.

  • I did once project on a glass, which was only slightly dirty (regular window glass, not washed). The result was stunning in complete darkness.

    --8

  • Hi Skulpture,

    I've done this sort of thing quite a lot with varying degrees of success.  A few additional details might be helpful. What sort on an environment will you be in: theatrical; club; installation?  What are the competing light sources?  You say the thing needs to be as see through as possible, but then say it can be frosted, so do you mean that you have to be able to see the details of what's behind it or just that there is "something outside"?

    Something that we use a lot in the theatrical world is sharkstooth scrim: http://www.rosebrand.com/subcategory155/fabric-by-type-sharkstooth-scrim.aspx

    The great thing about scrim is that when you light in front of it or side light the fabric itself it's opaque, but when you light behind it, it becomes translucent. You can project on to it quite successfully.  it comes in varying weaves up to 35 feet, so you can make very large surfaces if you want to!  Mark did something like this in Loopdiver using mosquito screening, which is cheap and has a similar effect.

    Rose Brand is in the US, but there are plenty of European manufacturers, as well.

    You might also look here: http://rosco.com/uk/index.cfm for ideas.

    Cheers,

    Hugh

  • Izzy Guru

    If the project goes ahead it will be in an art gallery and/or museum.

    Very expensive collections in glass cabinets. Some air tight. Various sizes but none of them huge (less than 4ft across)
    My idea was to use small projectors located in front of the glass and projecting onto small areas of the glass cases with information, short videos, some branding, etc. 
    The scrim sounds good; i'd heard of that before but forgot about it, thanks.
  • Izzy Guru

    Also worth looking at.
    http://www.ssidisplays.com/rear-projection-film/intrigue

    Best,
    Michel

  • Beta Tester

    Does it need to be glass or would something like half frosted acrylic work? That would be cheaper and much easier to handle and install than frosted glass. Available in sheets up to 4'x8' and I have used it as an RP surface before with good results.


  • Hi,

    I did some experimentations and shows projecting on frost plexiglass.
    I can give only one advice: 
    Try every material in the exact situation it will be used !
    I had one very bad experience: I tried one material with a long zoom projector, the image was ok.
    But at the end I had to use a wide angle projector. The center of the image was perfect, but all around the light was arriving on the surface with too much angle and was impossible to see !
    Also take care to the angle the "spectators" will have, with that kind of shiny surfaces you get very differrent results depending on the point of view.
    Have fun !
    Best
    Mehdi

  • @Skulpture - It sounds like a really interesting project!

    Given the situation, I would be inclined to go towards the really expensive films.  In small quantities they may be affordable and they will provide a good projection surface.  Most importantly, they won't affect how the viewer sees what's inside the case.  I would think that would be the #1 consideration from the museum's point of view.

    Cheers,

    Hugh


  • @skulpture.  If your prerequisite is to be able to see a sharp image and still have the glass to be transparent, there is really only one solution and it's expensive: HoloPro. Similar glass was used in the movie Minority Report.

    I installed and use an 8' wide HoloPro glass panel at my company for presentation purposes and it's amazing. To get clarity and transparency of glass, embedded holographic foil is really the only solution.  Otherwise, you need to go with rear-projection film (and of course, this means you won't get the transparency.
    Cheers.

  • Here is our installation:


  • this is an interesting thread.  i did some searching and found this uk outfit:

    http://www.prodisplay.com/index.html
    lcd glass is great, but does it go clear enough for a museum setting?

  • Hello,

    Some friends was worked on this show in Avignon. Verry cool projection on glass!

    http://www.theatre-video.net/video/Le-Livre-d-or-de-Jan-extrait-video

  • Izzy Guru

    All brilliant stuff thanks all!

    You've all really helped me out and given me lots to think about. 
  • Izzy Guru

    @dansnodgrass the HoloPro is amazing and looks stunning but yes you are right... very expensive.


  • You'll also notice in the picture of the HoloPro, that the woman is interacting with the presentation.  This is facilitated through the use of the VIP Interactive TouchFoil produced by Visual Planet (and not available at a store near you for about $10,000 - for the 3'x8' foil you see in use here.)


  • ..projection on glass

    ORGANIC
    for the low tech end  (and of course budget) try buttermilk: applied thin with a foam paint roller it will dry after approx. 20 minutes (3 time s). it's a charming. try it before applying at the flagstore ,-).
    and you can accentuate the vintage look with a brush etc, get a cleaner look with  airbrush (?)...   just  experiment!.. removes with water

    PLASIC
    (low end) we used to take frosted sandblast foils - they're not soo expensive and easy to remove. get some sample and try

    have fun mickey