DIY Screen help needed :)

Discussion in 'Projectors, Screens & Video Processors' started by JSW, May 26, 2002.

  1. JSW

    JSW
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    Having just got me AE100 and still undecided on which electric screen I want I have decided to make a screen to last a few months.

    I have purchased a Swish blackout roller blind stated as being white but next to a white one it looks grey!
    I went to the paint mixing counter in BQ warehouse and got a colour swatch of Icestorm 1 to 6 and held it against the blind,
    it is very close to Icestorm 6 :) so hopefully will make a good screen.

    It is 6ft wide with a 5' 4" drop. I have purchased some matt black paint and some pva glue in order to paint a border round the blind in the 16:9 format.

    So if I have say a 2 inch border on either side and 4 inch bottom what would the top boarder width need to be ? roughly I think 12 inches but please correct me if im wrong.

    Also will painting make the blind crinkle?

    and should I first give the whole blind a pva coat?

    Thanks in advance I await with brush in hand :)

    Bry
     
  2. Bert Coules

    Bert Coules
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    Why not put the blind up where it's going to be, place the AE-100 in position and project a 16:9 image onto the blind fabric? Then you can accurately mark the corners and be sure that your painted borders will be in the right place.

    The idea of the PVA is to stop the paint cracking, not the blind; I believe the usual approach is to mix it with the paint and then apply the mixture to the fabric, rather than using the PVA as a sort of undercoat.

    Good luck. I'd be interested to know how you get on.

    Bert
    http://www.bertcoules.co.uk
     
  3. JSW

    JSW
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    Tks bert but I wanted to know if the paint would make the fabric crinkle not crack?

    Oh and I dont want to put blind up put panny up first only to have to take it down again. I just wanna get painting and then put it up heheheh
     
  4. Bert Coules

    Bert Coules
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    I misread your post. I don't know if the blind will crinkle. Most blind fabric is specially stiffened, so the odds are presumably quite good that it will not.
    I'm sorry, but I don't quite understand what you mean. If it's the blind which you don't want to have to take down again, the effort involved is surely minimal? Most blinds just unclip from their fixing brackets.

    Bert
    http://www.bertcoules.co.uk
     
  5. JSW

    JSW
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    Nothing is up yet and I do understand your method is probably the best aproach but i'm impatient lol and 16:9 can be measured so there should not be any need to put blind up first.

    Really just need the maths for the dimensions to keep the aspect ratio.

    Thanks
     
  6. Bert Coules

    Bert Coules
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    You really must be impatient (g) - in the time we've taken to write and post these messages, you could have put the blind up!

    How do you mean, you need the maths? The ratio of width to height is 16 to 9. I'd be delighted to help, but really what else you do require?

    Bert
    http://www.bertcoules.co.uk
     
  7. JSW

    JSW
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    Does this sound right ???

    171cm width by 91.2cm height ?

    Thanks
     
  8. Bert Coules

    Bert Coules
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    No, you're a bit out there.

    JSW:

    OK, let me talk you through it step by step:

    You have the width: 167cms

    First divide this figure by 16.

    Then multiply the result by 9.

    The result is the height.

    I suspect that you thought it was a lot more complicated, but it's really dead simple. "16:9" just means that for every sixteen units across, the screen is nine units high. So if your screen were 16 cms wide, it would be 9cms high; if it were 32cms wide, it would be 18cms high, and so on.

    The ratio holds true however big or small your screen is. A 16:9 screen 64 miles wide would be 36 miles high (and you'd need one hell of a projector, not to mention an impressive living room...)

    Give me a shout if you need any more help.

    Bert
    http://www.bertcoules.co.uk
     
  9. JSW

    JSW
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    Thanks Bert :)
     
  10. JSW

    JSW
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    Now how do i mix the pva with the paint lol

    Pva instructions say 20 parts water to 1 part pva to stiffen fabric but if i do this surely it will water the paint down?

    Or do i paint first then go over with the pva ??

    Thanks
     
  11. Bert Coules

    Bert Coules
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    I think you're confusing two quite different things. You don't want to stiffen the fabric, you want to unstiffen the paint, so to speak. So forget the instructions - they don't apply here.

    I'm pretty sure you have to mix the paint with the PVA and then just paint on the resultant mixture. This has been discussed here before, with at least one poster mentioning a good paint-to-PVA ratio. Try doing a search of the site for "PVA" and you should find the message.

    What are using to make straight edges? Masking tape?

    Bert
    http://www.bertcoules.co.uk
     
  12. JSW

    JSW
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    was gonna use parcel tape as it is stickier ?
     
  13. Hex

    Hex
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    Masking tape would be better than parcel tape!

    with parcel tape you may damage the screen surface, masking tape will peal off without damaging the surface!

    Hex
     
  14. Bert Coules

    Bert Coules
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    JSW, I wouldn't advise using parcel tape. As Hex says, the fact that it's stickier is not necessarily a good thing. Masking tape is designed for the job.

    What did you make the vertical height on your 167cms screen in the end?

    Bert
    http://www.bertcoules.co.uk
     
  15. JSW

    JSW
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    bert i changed dimensions to: 171 x 96.2cm

    masked and rdy to paint
     
  16. Bert Coules

    Bert Coules
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    Good luck! I hope it goes well. Do post the results, particularly about the PVA-paint mix and how effective it is at stopping the paint cracking.

    Bert
    http://www/bertcoules.co.uk
     
  17. JSW

    JSW
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    Ok blind now painted and mounted :)

    This is What I used to make my 6ft 16:9 screen:

    1 x Swish Blackout Blind White 1.8m (next to white looks grey) £59.98

    1 x Tate Matt - Soot - Tester 75ml £0.98

    1 x Unibond PVA 250ml tin £4.58

    1 x 1" Brush £1.98

    The blind material is exactly 177cm wide and 5'4" in height.

    I wanted to keep as much as possible viewable so chose a small 3cm border down each side of the blind this left 171cm viewable width.

    The border along the bottom of the blind I made 10cm then measured up from that 96.2cm where i then made the top border 20 inches wide. leaving the remainder above unpainted as it would never be seen.

    The mix I used for the paint pva was: 25ml water, 2 teaspoons of PVA (easier than pouring out of the tin) mixed together well then added the 75ml of Soot paint and mixed well again.

    This was very easy to apply and as I suspected made the screen wrinkle all over the place, but fear not It dries out pretty flat again and after being rolled up for a few hours while I removed a length of cornice and mounted the brackets it unrolled perfectly flat :)

    Now up it looks great just gotta install the pj now which is gonna take a while.

    Will post some pics when all done.
     
  18. Bert Coules

    Bert Coules
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    I'm pleased to hear that it's turned out well. It sounds as though the PVA-water-paint mix has prevented the paint from cracking; thanks for posting the exact mix.

    Bert
    http://www.bertcoules.co.uk
     
  19. JSW

    JSW
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    The blind has been up n down a few times today and i'm confident the paint will not crack :)

    BTW all materials came from B&Q Warehouse.
     
  20. JSW

    JSW
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    A few more tips:

    After looking at the screen I noticed that my top border didn't seem straight so I took out me tape measure and found one end was lower by 2mm :(

    So I decided to go and get some Icestorm 6 to cover the viewing area and correct my border.

    To make sure I got a perfectly straight line this time I bought a 2m length of white melamine shelving for £2.13 which after I finsish with it can be a shelf in the garage.
    I also got some wider masking tape.

    Now using the shelf as a guide i re masked the blind and gave it 2 coats of Icestorm 6.

    After it was dry and I removed the masking tape I had perfect straight borders BUT some of the Icestorm 6 had bled under the masking tape a little making it look a bit naff.
    I used a black marker pen to go round colouring in where it had bled and am very happy now :)
     

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