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Q: What's your opinion of the dehorning of masters? A: Well, I don't know of anybody who does that anymore. It seems to have been fairly popular in the sixties or seventies or whenever. A cutter stylus cuts and it also plows. With a snow plow you go down the road and you pile up all this humongous crap along the curbs and sidewalks. Well, you hope you don't get much of that when you cut. Cutter styluses are manufactured much better nowadays than, shall we say, thirty years ago. The burnishing facets weren't so accurate then. Sometimes you got a nice cut in the groove but then sometimes you didn?t, and there might be a bunch of stuff stacked up at the edge of the groove. That stuff was rough-textured and made separation of the lacquer master from the first metal plating very difficult, because the stuff that's thrown off, when viewed under a microscope, looks like a string of cinders. It's porous, like a sponge, you see. So when you're electroplating that stuff, well, the metal molecules get inside and you can imagine metallic nickel getting inside a sponge and then how do you peel a sponge off that electroplating? You're left with little bits of stuff stuck to the metal (NOISY!). So the idea was to knock off those. It affects the sound. I don't know anybody who does dehorning anymore. At least I don't know anybody that's involved in high quality work who does it, mostly because there?s no need for it with today?s better styli." |
bigaudioblowhard wrote on Thu, 05 April 2007 16:08 |
Okay, bring on the jokes. But seriously folks, just recieved some METAL MOTHERS that had big red stamped lettering that reads DEHORNED What is this? bab |
bigaudioblowhard wrote on Thu, 05 April 2007 15:08 |
Okay, bring on the jokes. |
bigaudioblowhard wrote on Thu, 05 April 2007 15:08 |
Okay, bring on the jokes. |
TotalSonic wrote on Thu, 05 April 2007 17:44 |
When you pull off a nickel father off of the original silvered lacquer master it sometimes can have the impression of the "horns" - the material pushed to the sides during the cutting of the lacquers - which are tiny bits of material on the surface (on the uncut land that goes along the top of the grooves) that extend out like horns when you look at them under the microscope. These are often removed in a process called "dehorning" in order to create a stamper that won't press these defects into the vinyl record itself. As Stan Ricker noted dehorning came into disfavor with many plating facilities as cutting and plating techniques improved and minimized the occurance of the problem - and also because the process of dehorning can sometimes lead to decreased definition of the program material if it is not done carefully. fwiw - at Europadisk we wouldn't dehorn the stampers that we pulled off of the Direct Metal Masters. Best regards, Steve Berson |
bigaudioblowhard wrote on Sun, 08 April 2007 15:49 | ||
Steve, I'm assuming one DEHORNED the lacquer BEFORE the first plating, no? |
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As I understand it, the horns would be negative on the FATHER, or like little holes in the uncut land between grooves. |
ak wrote on Sun, 15 April 2007 16:09 |
it is necessary to "dehorn" mothers when the master was a lacquer disk. Thats what all good plants do. but it has to be done right. otherwise a looot problems can occur. (Don?t want to write a book now..) |
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They can also repair overcuts sometimes, then they are nearly unhearable. |
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When i make cuts for overseas pressingplants to make sure the quality of the record will be good i often sending them mothers from my favourite plant (dehorned, and tested) so the other plant just have to do the stampers and can press. |
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A lot of myths are going around if a mother is polished (dehorned) to long or to hard the highs can get lost. Anyone made some experiments ? |