DIY Darkroom Trays/Sink?

[Andrew Tymon]

Here you go http://colinflanarygraham.com/darkshop/?p=3131

[Tracy Storer]

Anyone wanting to make a sink using resin and fiberglass should watch the linked video for very helpful hints on technique.

To seal my darkroom sink, I used fiberglass and marine grade resin over plywood with great success.

https://www.youtube.com/watch?v=9jHUI0CiYbs

[Eric Woodbury]

Plywood with an epoxy paint I bought at the marine store. Doesn't leak. I did seal all the cracks and corners during assembly.

Right after college a friend and I built a sink from cardboard that we fiberglassed. It went around a corner in the garage. Very odd shape. Used it 7 years.

In high school, way back, I made a tray in the 'Color Canoe" style from cardboard and fiberglass. It didn't require much developer to process a large print.

[EdWorkman]

First sink I built was on a hollowcore door, with plywood sides, waterproofed with epoxy paint
Epoxy paint runs and sags on vertical surfaces, so I had to add a thickener- might have been diatomaceous earth.
In any case it was a recommended thickener.
Next time I built a sink from ABS
I made a frame of ripped 2x4 stud material- to 5//8 by 3 1/2 and nominal 2x2 legs- a 2x4 hasn't been 2"x4" for 70 years
Most of the sink is 1/8 sheet cut to appropriate size and shape. For instance, the back splash is deeper at the center than at the ends- top is straight.That warps the floor of the sink toward the center backside to drain.
I stiffened the top of the front with ABS strip, although I probly didn't need to.
Later I made trays from 1/8 ABS roughly 12x44, in order to print panoramics on paper up to 10 in wide
I made a deeper wash tray from the white hard-foam kind of plastic, cuz I had some
Thin ABS saws as easily as plywood, if not easier.
And the gluegoopsolvent is easy to use.
Find a leak? daub some goop
regards
Ed

[Jim Noel]

Anyone ever built large darkroom trays or a sink before?

I would like to learn from your experience and knowledge because I am considering building a sink and some custom trays, but I wanted to maybe hear some ideas that have been tested and are known to work.

I was thinking of building the tray/sink out of plywood and then lining them with some type of laminate and sealing the seams with some type of waterproof silicone or something. Just a rough idea.

I have heard of people building stuff like this, but never knew the details before.

Anyone?

Thanks

Larry

Build itof plywood and then finish it with "West System" Epoxy. Be sure to read their booklet on proper use. I built min in July 1989 and it has never leaked. I have added layers as old ones became scraped and ugly. I used their ground carbon to make it black. All corners are filled with their materials for the purpose. It is sold by suppliers to yacht owners and boaters. It is guaranteed not to leak for 10 years when applied to a boat following their directions.

[LFLarry]

That looks really nice! Thanks for the YouTube link.

To seal my darkroom sink, I used fiberglass and marine grade resin over plywood with great success.

https://www.youtube.com/watch?v=9jHUI0CiYbs

[DeBone75]

Making stuff your self is fun and rewarding. How big of a tray are you looking for. If no bigger than print size 20x24 then Lowe's or home Depot has the trays for under a washing machine. Plenty big for 20x24 and are only $23.00 each

[Liquid Artist]

As for how I got the solution out of the trays when finished, it seems I have blocked that part from my memory. It probably involved lots of bailing.

- Ed

I could see that being a problem years ago, however with all the cheap electric pumps today it's easy.
I elevate my large trays and just syphon them out. However I am thinking of developing a gutter system in my new darkroom.

[Corran]

Regarding trays: I was at Home Depot today and saw some trays in the plumbing area I think for putting under a hot water heater or something. Maybe it was something else. They even had ridges like my print trays. They were kinda big (16x20 print size) but there may be some other smaller ones elsewhere.

I don't use a traditional sink and I don't see why a huge sink is necessary. But that's just me. Keep your eyes open on local marketplaces like craigslist and Facebook groups and you may find trays or even a sink for cheap/free. I bought another enlarger a few months ago and the young lady sold me some 16x20 trays for a few bucks a piece. They were going to be trashed otherwise.

[LabRat]

One good reason to build a deep sink is you can dump trays into it without the risk of trying to lift and carry the trays to a different place to drain or dump them, so this will help prevent a spill... Some old trays can be brittle and crack/break when lifting them while full, so best to fill/dump right where it sits...

If you use an archival washer, it should be in a high walled basin, because if it should break, most of the overflow will be caught by the basin if disaster strikes... (I was working in another photo lab one night, when I heard a loud crack, and turned to see for a split second the acrylic walls fall away and saw a rectangle of water standing up that very quickly fell into a wave that caused a flood... He said it happened to him a couple of times before, and I saw the washer sat on a very uneven spot in the molded sink that strained the seams causing failure, so make sure the washer has a flat, solid footing...)

Steve K