dehorned mother

[vhugo31]

Hi, all
I have got a troubles with puppets on LPs (its surface is sensitive to touch). Would anyone know how to fix the problem - what kind of procedure should be followed to avoid the puppets?Can you hel me how dehorned mother or "lacquer "?
Appreciate your advice
Thanks

[Steve E.]

Am I missed something here?? what does this mean? I feel like I'm in the middle of Dylan's "Ballad of a Thin Man" or something.

[opcode66]

If your grooves have horns that is cut into the master. Either a dull stylus was used or the stylus was over-heated. Not sure if anything can be done other than having a new master cut.

[Steve E.]

What are "puppets"???

[opcode66]

I was wondering the same thing...

[Nickou]

static electricity discharge make that

[Steve E.]

crackles?

[Nottinghamtoolexalpha2]

Horns never really use to matter unless the record jumped - usually they come off as soon as the stylus passes over them ....I always thought it was the plating that was the cause - not the master/laq...?

[opcode66]

i've read that an overheated stylus can cause horns. a fellow cutter also told me this tidbit of info.

[Aussie0zborn]

Yes an overheated stylus and over-modulated groove can cause horns in the lacquer. Looking at a cross section of the lacquer disc, these appear as waves extending over the edge of the groove and often curling over. K-Disc USA wrote an excellent white paper on this subject.

[GeorgeZ]

Yes an overheated stylus and over-modulated groove can cause horns in the lacquer. Looking at a cross section of the lacquer disc, these appear as waves extending over the edge of the groove and often curling over. K-Disc USA wrote an excellent white paper on this subject.

I've just started cutting lacquers with our VMS-70 so I'm also interested in that white paper about horns and how to dehorn lacquer plates (or mothers???)... I want to avoid them at my lacquers and also to know how to remove them if somebody supplies us with a lacquer foil full of horns. Can you post here a link to that paper? Thanks.
BTW: No similar problem with DMMs

[andybee]

http://www.youtube.com/watch?v=nrs8CgpH980

[mossboss]

Puppets on a lacquer Andy B mate not on a string

Horns! well bulls and cows have them as well as some other creatures
Seriously,
Horns is an old term dating back when wax was the cutting medium and graphite was used to make the wax conductive
These nowdays will be on the lacquer due to a variety of reasons the most common one is the lacquer itself which will by the nature of the process will get "compressed" by the stylus as it ploughs its way through it
The cut area will want to find its way back to its original state so it will "move"
Very fine hair some times will pop out on the cut area which after been silvered will atract a lot of nickel on them as the deposit is build up
So the way to do it is dehorn the positive if any pops or clicks are heard during play of the positive
There is no way you can dehorn a lacquer or a negative
The neg is not able to be played back so it is done on the mother or as the Germans call them Father in other words the positive part of the metalwork
Fine needle sharpened under a 20 power glass with the right angle a very fine wheel or diamond wheel a good microscope a good pair of ears
Pick them out done, than the negatives would most likely be fine to go into production
Common practice years ago rarely done today if at all
There is no way that horns will ever be scraped away during play back either not if they are on the groove of the negative as it will be the positive on the record in other words there will be a "hole" there which causes the pops and clicks depending how bad they are
Cheers

[Aussie0zborn]

After a couple of PMs I iwll dig out the the white paper I mentioned. It is somewhere in my archive and my archive is somewhere in my garage so this is a project for the Christmas holidays. The paper was published by the now defunct Keysor-Century Corporation who made a very nice vinyl record compund and who were the owners of K-Disc, the cutting and pressing facility based in California and gives you a very good understanding of how horns form.

Another method of de-horning mothers was to use jeweller's rouge to polish the surface of the mother but a steady hand with a good microscope and an old sharpened darning needle does the trick perfectly.