Chemical Mixer


Introduction: Chemical Mixer

About: Andy McLeod, Design Engineer. Creative studies major. I still want to save the world. Maybe I need a cape.

Does anyone still mix D-76 or other photochemistry in their kitchen? It doesn't disolve too well with the agitation that you can supply with your arm and a spoon. Making a stirrer out of 3/8" tubing was much easier than finding and buying one- camera stores are not what they used to be by any stretch of the imagination.

Step 1: Cut and Knot 3/8" Plastic Tube

The stirrer is just a 3/8" plastic tube, probably vinyl from home despot or similar. 2 feet is about the right length for stirring in a gallon milk jug.

A simple knot near the end makes a weight that will swing around when you spin the tube.

Step 2: Chuck Into a Drill

3/8" tube barely fits my 3/8" chuck. Make sure to size your tube to fit your tools.

Step 3: Rock and Roll.

This works much better than arm supplied agitation, a lot faster too.




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    I would use a stirring paddle. Shaking a jug or using a drill to mix photo chemicals cause rapid oxidation of chemicals which will degrade the shelf life.

    When I mix fixer (just sodium thiosulfate) and distilled water, I just pour the crystals in the jug, add water, screw on the cap to my milk jug and shake it up. Why get out the drill?

    3 replies

    Sorry... Your mod is cool and inventive. I didn't mean to sound like a jerk.

    Nonsense. "Why do civilian Hummer's only seem to fit 1 or 2 people?" is a similarly perceptive yet important question.

    I'll try that. For some reason developers stuck in my mind as being a pain in the ass. For a while I used Rodinal cause the liquid stock lasts a long time and you just dilute 30:1 or so. To bad you need someone to lie to the post office to ship this hazmat.

    aye, it is a good mod, nice and cheap too.

    wouldn't a modified paint mixer (for drills) be more effective + quieter?

    1 reply

    A few reasons I like this: No noise problem- I didn't hear it over this drill. I have a mixer that I use for slip and ceramic glaze. It'll spit back at you if your not careful, and won't fit in the mouth of a milk jug. No problems with mixing effectiveness- it took me longer to scrounge the tube, and get ready. I used to have a Kodak stirrer that I cut the end off of so I could chuck it up in the drill, but this cost about $9.50 less.