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In Reply to: Re: How different can it be ? posted by Thorsten on January 3, 2005 at 11:52:04:
> There are only a handful of possible ingredientsAre you sure?
Yes, absolutely sure. Of course, there may be possible hands with a great number of fingers... thus a handful could potentially be a large number of ingredients, extraterrestrial hands for example...but judging from the aroma, the viscosity, color, drying behavior it has all the traits of an organic tree rosin origin varnish in a semi-polyemrized vegetable oil carrier...
> so the only differences would be one of percentage...
Maybe. Maybe not. Make up pur own mind and stop guessing would be my suggestion.
It is my nature to keep guessing. Since the experiments with the diamond powders + C37 yielded good results in certain applications, we now contemplate the basic C37 and the "post C37" technologies. Lucky for me I didn't get into fullerene additives and poison myself.
I'm also considering metal additives, such as superfine silver flake for added mass when that might help.> C37 is used a as violin lacquer isn't it ?
No, there is also violin laquer that incorperates the same principles, but it is likely again a different formulation.
So what are all those Ennenmoser C37 violins painted with ?
As for violin laquers, there are many possible fundamental laquers, including "classic" natural ones and modern polymers
Follow Ups:
If you want a metal powder to add mass, buy some powdered tungsten from your local golf supply or a specialist such as THP.Tungsten powder has the highest "tap density" of anything available under $100 an ounce. As with most powders the tap density is about 60% of bulk density so a good quality powder will get you about 11 kg/dm^3. This means you can get the density of a resin paste up to nearly 12, better than the bulk density of lead. The best you can do with silver is around 6.
As usual you also need to consider propagation velocity (C). The tungsten composite will still have a reasonably high value of C (somewhere near 3600 m/s) but the silver will be quite low. Of course you can always increase C by mixing in some of your diamond powder.
another long and winding road... silver has a nice essential tone and a decent density. The design goal is closer to spectral shaping than pure vibration elimination. Brass has often been cited as having a desirable spectral response, Mapleshade offers a selection of brass cones, dampers, and the like based on their opinion that brass has the best perceived sound of all metallic or ceramic damping options. Silver may be yet superior but not considered as a commercially viable choice. Silver does have a distinct, musical resonant peak. Even large ingots of silver have a sweet, bright sound when dropped. A fascinating possibility is that a lacquer coating such as C37 which is inherently euphonic could be "tuned" by a careful mixture of diamond, metal and/or mineral powders, tungsten carbide... the major hurdle with super heavy particles like W or WC is that they won't stay suspended. Keeping diamond in suspension is difficult enough. I was thinking that a large surface area silver micro flake would have a better chance of staying up.
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