DX labels: you’ll thank me on your wedding night!
Every man with a hobby or particular skill likes to publish a self-serving, single-criteria test of manhood: whittling, hunting, tiling a bathroom, fishing, purifying rain water, rebuilding a Cleveland V8, growing hydrangeas, surviving a Turkish prison after a bad rap for hashish, brewing beer, operating a sailboat, bedding a strumpet, making an adequate gin & tonic, constructing your own lightsaber, &c.
Now I say unto you that you will not truly be a
man mature adult unless you can generate your own DX coding stickers decals so that you can use underwhelming offbeat slow-speed film in your way-too-expensive point-and-shoot compact camera. Or get your camera to read your Tri-X as 320 because your technique is that good, your meter is that accurate, and that 1/3 stop makes a huge difference. And because you’re too lazy to turn that ISO dial!
I was actually doing the former – trying to use 50-speed film in a Canon Sure Shot (Prima) 120 Caption, a phenomenal camera that oddly defaults to ISO 25 when it can’t read a DX code (the reliable plastic bulk loading cassettes are uncoded…). You just can’t overexpose Pan F Plus… and try using a P/S zoom at EI 25… and what better excuse to trash my home office with bits of paper and foil? And naturally, a child in the household had stolen the only X-acto knife with a good blade, so I wasn’t going to do it by hand.
Commercially-available DX labels are limited in ISO choices, and they are also surprisingly expensive. Also, film photography these days is about reinventing the wheel. You can make decals, in a completely overwrought and overly-technological way using a machine that might already be in your household: the pattern cutter (Cricut, Brother Scan ‘n’ Cut, etc.).* We have the Brother,** so you may need to adjust your technique slightly for the Cricut. A Brother has two funtions: drawing with a marker and cutting with a blade. We will use both techniques.
*I am fully aware that this is most likely to be in your household if you already have a spouse, and that the only way to get a spouse might be to perfect your DX decal skills, which is hard to do without a pattern cutter. Such a conundrum! Better brush up on your beer-brewing.
** The Brother is way more goth than the Cricut.
You will need: your cutter, its pen and knife attachments, a roll of commercial film for reference, a DX decoding chart (available online), some half-page (Ebay) labels, and a roll of self-adhesive metal foil (0.05mm / 0.002 inches or thicker). It can be any metal you want (aluminum, stainless, brass, copper), as long as it is conductive.
The drawn outer box. On your design software, make a box that is 33x15mm. Designate that “draw.” This will contain two rows of six boxes, each 5.5mm wide and 7.5mm high. Make these 12 boxes and position them in a grid. Looking at your DX chart, color the boxes you want to be insulators (i.e., black and not silver). Fill color doesn’t matter. These should be “draw” shapes.
Your DX code. Look at the decoder and figure out what film speed you want. That’s the first row. For the second, row, number of exposures, I would recommend 36 (so the 2nd and 3rd spots insulated). If your camera reads exposure count, it will then rewind neatly so you have 6 strips of 6.
Negative space (conductors). Now change all of the little white boxes (the ones you did not color in) to “cut.” Where they are touching, merge them. In the ISO 50 example in the pictures up top, these will result in one L shape and one T shape.
Optionally, you can also delete the color-filled boxes because they were only there for reference. Your finished label can use white paper as an insulator. But it also looks cool if you leave the solid boxes. That’s what I did for the pictures.
You can also add something to the top or bottom of your big box to remind you which direction the decal points. I make an extra 3mm box that I point at the 35mm cartridge opening. I suppose you could make a really long one if you wanted to.
Clone your decals. Now draw a selection box around your DX decal design and “group” it using the design software. This will allow you to clone and arrange copies without having any of the elements get out of place. I made two rows of 5, spaced 30mm top of one to top of the next, 50mm from left edge to left edge.
Draw the decals. Move the design file to your cutter. Insert a sheet of label paper. Run a “draw” pass. This will sketch the outline of the DX decal, and if you left them in place, draw in and fill the insulator squares. If not, you will just see the outer 33 x 15mm rectangles.
Cut the codes. Now run the “cut” pass. This is where the magic happens. Do it with a “kiss cut,” or the type that does not cut through the lining of adhesive material. When the cut pass is done, you can pull out (I think they call it “weed”) = the shapes corresponding to the “conductors” – so I pulled a T and an L. You will see the shiny label backing through the holes.
Cut out all the decals as a group. Now cut around all of your labels as a group (I recommend scissors, but you could automate this). This will give things structural integrity because you will next peel them all off in one piece and set them on the top side of your metal foil (your “insulators” should all be attached at a minimum of one edge to the “frame”). From there, you can cut your individual labels as closely as you want.
Trim and apply. Now your metal foil holds everything together. Peel off its backing, position the decals on your cassettes using a commercial cassette for reference, and validate using a DX camera, preferably one that shows you the selected ISO. On a Nikon, for example, you can put the cassette in, close the back door, and if your ISO is on DX, all you need to do to read the cartridge is hold down the ISO button. Do this for each cassette.
You can obviously re-use your design file to make more – and it’s pretty easy to change ISOs in your design file. Just keep a master file in which all 12 of the little boxes are still separate.
You’ve made it! Years from now, when you have 2.5 children, a happy domestic situation, a great job, and a really cool electric car or carbon fiber bike, you’ll know that all this work paid off. If we don’t get to talk then, you’re welcome.