DIY 8x10 floating lids

Discussion in 'Darkroom Equipment' started by jordanstarr, Apr 10, 2013.

  1. jordanstarr

    jordanstarr Member

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    I did some searching and couldn't find anything on APUG, LFF or even Google. I know it's been talked about so maybe I have to work on my research skills.

    I'd like to make some 8x10 floating lids and can't seem to figure it out. I can't find lids for sale (without the tanks anyway). I only NEED one for my developer because I'm getting sick of spending $5 on replenishing every time I run film through every 2-4 weeks. But for a DIY project, I'm sure I can make 3 for next to nothing. Some thoughts? Experience?

    As always, thanks in advance!
     
  2. Andrew K

    Andrew K Subscriber

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    now this brings back memories of when I first started working professionally in darkrooms in the early 80's - which is the last time I used deep tanks!

    We had a couple of DIY solutions to prevent oxidisation. The simplest one was to use a lid on the tank, as this stopped most of the problem - a print tray turned upside down worked for us..

    As for a floating lid I use a sheet of "plastic foam" - sorry I can't recall the acual name of the foam, but it's white, very light and rigid - it's often used in packing of electronics products etc. It's cemically inert, and floats. You cut it with a craft knife. I seem to think we made acouple of small holes in it, threaded a piece of thin plastic rope through the holes and tied knots on the underside to give us handles..

    They seemed to work very well, and if one ever needed replaceing it was only a 2 minute job to make another one..
     
  3. SMBooth

    SMBooth Member

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    I think its called fluted board. How hard is it to pour back into a bottle..
     
  4. ath

    ath Member

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    +1
     
  5. Mike Wilde

    Mike Wilde Member

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    Trade name I know this by is cor-flute. Like corrugated cardboard, but made from plastic.

    I find it at the art supply store, stocked near where they stock matt board and mount board panels.

    Edge sealing the open hopes with some applied and then smeared in silicone would seem to solve the problem of oxidized solution collecting in the corrugations.
     
  6. mgb74

    mgb74 Subscriber

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    No experience, but would wood coated with something like Plastic Dip work?
     
  7. jordanstarr

    jordanstarr Member

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    They're 8x10 deep tanks. About 14 litres of fluid. So, to answer your question -hard enough. I've worked in a pro lab that used floating lids and the developer spoiled just as quick as it would being in 4 different jugs. I'd like to get those results.
     
  8. SMBooth

    SMBooth Member

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    Sorry but by the sound of you first question you had a 8x10 tray with a litre or so.
    What about plastic cling wrap and then put the fluted board on that , should seal pretty good
     
  9. ath

    ath Member

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    What about a simple styrofoam plate cut to size?
     
  10. jordanstarr

    jordanstarr Member

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    Thanks for the ideas guys. I'll check with the electronics guy across the street and see if he has any really dense sheets of styrofoam. I didn't think it was chemically inert, so I didn't think of it. I currently have a top lid and use plastic wrap, but there's a good 2 inches of air and it hasn't been working.
     
  11. DWThomas

    DWThomas Subscriber

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    Here in our kitchen we have a couple of plastic cutting boards that are about 5/16 inch thick, sort of a milky white translucent plastic (found in many discount stores). They actually float, although mighty low in the water and I'm not sure all are of similar density, it might take experimentation. They may come in large enough sizes for your need (they can be cut to size/shape -- I used one as raw material for a project). The advantage would be they are solid material and easily rinsed off. I suppose one could drill a small hole in a corner to hook and lift them out.