Also, PLA really doesn't get along well with the caustic and wet environment of the concrete which makes me kinda worried for the structural integrity of the center hub. Might have to switch to something like PETG for that if it turns out to be a problem.
Might also make sense to use PETG for the mold to make it reusable.
Kinda wobbly though…
looks like something got under the center hub while casting, causing it to turn out at a slight angle. Looks like I need to fixture it better for the next attempt
After a bit of a hiatus (which was really just me getting really distracted by photo chemistry) I'm working on my record lathe again. Took some time yesterday to cast the concrete platter which now gives me some time where I can just do nothing while it cures over the next few days and still feel productive.
I've been playing around with trying to make panchromatic/orthochromatic cyanotypes by using a dye sensitization process similar to what's used in silver halide emulsions after finding a reference to adding fluorescein to the sensitizer. No luck so far though…
All of these tests were exposed inside the rainbow cardboard box and they all only responded to the blue light. At least I've got a pretty good impression of the spectral sensitivity of the sensitizer now, so that's nice I guess.
Since my fluorescein hasn't arrived yet I've been using erythrosine which is also used in normal film. It's really hard to find any kind of information on the specifics though.
Today's exposure with ferric citrate sensitizer. Not as much detail in the shadows, but still a pretty nice look. Might have also just been a little more cloudy today.
Just a yeen doing yeen things. Arts and crafts, music, photography, 3D printing, electronics, sex toys.
Still a fox at heart. Also sometimes NSFW.