Hackaday Podcast 227: Open Source Software, Decoupling Caps, DIY VR 1 Comment The other thing I am surprised that you have not tried yet is starting out with your solution on glass or some kind of transparency film, and contact printing positives on paper from that.Īt any rate you have inspired me, I may look into this as it is somethin I have pondered for a while and have some ideas I would like to play with.
You may wanna try one of the plastic Fresnel lenses. So if you have to err, err on the far side. Which brings up the next point, the lens has more depth of focus behind the focal point than in front of it. This is why all the fixed lens point and shoot cameras had wide angle lenses focused at infinity, which in reality was more like about 20′ to infinity. A wider angle lens has a deeper depth of focus, so you want a wider angle lens. So, for minimum exposure time you want a large diameter lens. A camera that takes pictures that last for a few minutes and than fade away. As an aside for a while I had wanted to just use a sheet of the flow in the dark vinyl and no chemistry. One is a near a fisheye and the other is a big mother out of a projection TV.
So time to make the camera out of wood and or cardboard. I had been through a few moves with a pair of 8×10 view cameras I had been saving just for it. This is something I have wanted to do for a long time. a print and a pen/pencil/sharpie to make notes and you’ve got a solution that can take being dropped, folded, stepped on, rained on, and doesn’t care if it gets to -20f or +200F sitting on the dash in the truck. At the end of the chain the trade-folk (if I said “tradesmen” I’d be labeled a sexist dinosaur) usually are working from a paper copy… construction sites are rough environments and hard on delicate electronics. I would say the “never even make it to paper” comment isn’t correct, at least in my experience. That’s what it often boiled down to- several guys standing in ankle-deep mud gathered around the drawings rolled out on the hood of a pickup. Spending the time/ink/paper plotting a new original that was going to be rolled out on the hood of a pickup somewhere was wasteful. Plus, keeping originals vs copies differentiated was essential. “Back in the day” I ran many hundreds, probably thousands of sheets through a blueline machine… even after we had mostly transitioned to CAD a blueprint was still the fastest and cheapest way to make copies of the final drawings. Posted in chemistry hacks, Misc Hacks Tagged blueprint, camera, contact print, cyanotype, pigment, Prussian Blue, uv Post navigation And we wonder if ’s long-exposure process might be better suited to solargraphy. We’ve seen cyanotype chemistry used with UV lasers before, and large-format cameras using the collodion process. They’ve got a ghostly quality for sure, and there’s a lot to be said for that Prussian Blue color. Coupled with the distortion caused by the lens, the images are - well, let’s just say unique.
Blueprint paper chemical smell iso#
The effective ISO of the “film” is incredibly slow, leading to problematically long exposure times. It’s just a more-or-less-lightproof box with a lens on one end and a sheet of sensitized paper at the other. wanted to go beyond simple contact prints, though, and the ridiculously large camera seen in the video below is the result. The reaction creates the deep, rich pigment Prussian Blue, contrasting nicely with the white paper once the unexposed solution is washed away. Undaunted by the chemistry, began his journey with simple contact prints, with Sharpie-marked transparency film masking the photosensitive paper, made from potassium ferricyanide, ammonium dichromate, and ammonium iron (III) oxalate, from the UV rays of the sun. Naturally, this is one of those projects where expectations must be properly scaled before starting after all, there’s a reason we don’t go around taking pictures with paper soaked in a brew of toxic chemicals. Luckily, longs for those days as well, so much so that he built this large-format cyanotype camera to create photographs the old-fashioned way. Most building plans, diagrams of civil engineering projects, and even design documents for consumer products never even make it to paper, let alone get rendered in old-fashioned blue-and-white like large-format prints used to produced. When you’re looking at blueprints today, chances are pretty good that what you’re seeing is anything but blue.
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