---
title: 'UV Exposure Unit'
date: '2019-09-12T01:04:33+00:00'
type: post
word_count: 214
char_count: 1301
tokens: 279
categories:
  - 'Casein Printing'
  - 'Exposure Unit'
  - Photography
---

# UV Exposure Unit

![attaching UV LED tape to a board](https://gregr.org/wp-content/uploads/2019/09/IMG_20190910_203930-copy-1024x633.jpg)

I got back from a [Casein Printing](http://www.alternativephotography.com/casein-pigment-prints/) workshop a few weeks ago, and I’m gearing up to make casein prints at home. I’ve bought the two chemical components [potassium dichromate](https://www.ebay.com/sch/i.html?_nkw=potassium+dichromate) and [ammonium caseinate](http://stores.photoformulary.com/ammonium-caseinate/). The last big thing to do is build an exposure unit.

![complete UV LED exposure board](https://gregr.org/wp-content/uploads/2019/09/IMG_20190910_214019-copy-1024x768.jpg)

It looks like most home made exposure units use fluorescent tubes, but they’re kind of expensive and require holders and ballast. I found some [UV LED Tape](https://www.amazon.com/gp/product/B07D7RKJYS) on Amazon which should work, and it’s low complexity to setup — cut the tape to length, apply to the board, and solder wires to the tape to complete the electrical connection. It took maybe 2 hours to apply the LED Tape and solder everything together

I’m not sure how tall the exposure unit box needs to be, to get good coverage and diffusion, so I’ll prop it up for testing and then build an appropriate box