The Secret Society of Lathe Trolls

You might want to take a look at "RCA Review" in the period of 1979 to about 1984 (I don't have the exact issue in front of me). In one of these there was a detailed description of a laser based mastering system for the RCA CED videodisc. The recording medium was photoresist on a metal substrate. It...

Thank you again to mossboss for that very helpful information on the options for silvering and the costs involved. I need to get further along now with obtaining the optics and finding out more information on modulating the laser without destroying it. I hope to be able to repurpose some consumer pr...

I was just looking again at fusionkid's information on the cost of the catalyst for the copper plating operations. I was trying to do mental arithmetic while fellow workers are concentrating on American football games...So I got about 80 U.S. gal. into about 15000 English pounds might be about 170 E...

Thanks again to mossboss for sharing his experience in the silvering process. I am slowly getting together pieces for the experiments. The biggest plus lately has been that blue/violet lasers can now be found in the U.S. for $25 or so. This wavelength is necessary in order to expose photoresist. I k...

I was away from the computer for a couple of days, but I wanted to thank mossboss and fusionkid for their useful information. I looked again at the 10,000 times magnitication photos in the P. Legierse article and need to explain that the fact of some "globs" of the silver being about 0.8 microns(ran...

Thank you to Fusionkid for that information. I will try to follow up to locate sources of chemicals for PCB work and see if this might work for my application.

I have been following the forum for some time, but this is my first post. I am considering attempting laser based recording . The recording medium would be a flat smooth substrate coated with a thin film of positive photoresist. After the test recordings, the discs would, hopefully, be silvered usin...