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- เผยแพร่เมื่อ 28 ส.ค. 2024
- M Ito shows you the steps on how he removed lacquer (de-lacquered / un-lacquered) from a Trumpet. After unlacquering, the trumpet sounds a bit darker as measured by a spectrum analyzer.
The trumpet is CONN 9B Symphony Grand Gustat around 1930's, with some restoration and re-lacquering works done by a previous owner.
I am puzzled and indeed surprised by the decrease in the upper range as shown by your sound test. Non-lacquered brass musical instruments are generally thought of as being more responsive.
Thanks for your comment. I see. I just wanted to see how sound changes scientifically before and after de-lacquering on the same instrument. I used the same mouse piece in the same room, same desk. I tried to capture the screen shot when the first peak comes to the same level.
I agree it is a sound explanation that de-lacquering makes the thickness of the bell thinner/lighter and resonance frequency higher. It is worth looking into it.
It is more convenient to have a round brush at the end of a stick to wisk off the lacquer, and a pot of warm water to rinse it off in.
would the paint remover damage the inside of the slides and valve casings?
Thanks for your comment. The paint remover is very strong chemical. When it remains on the surface, it will affect the metal over time. Be sure to rince well with neutral detergent. Also, you don't need to apply the paint remover on where it isn't painted.
thanks
What the music of the video?
I just strip off lacquer from the screw bell, it is french horn but single F in ni-silver. The tonal impression horn tend to be better slotted in the high register and too bright in the middle again this is a new generation of horns made in three layers silver coating on a brass plus lacquer and i am using a fairly large mouthpiece. Again i am not reference of some serious playing, i play only occasionally.
Thanks for your comment. I'm curious how sound changes after de-lacquering and oxcide layer formed on ni-silver horn. How does it look like now?
@@vfd03445 I just noticed, it takes more time to warm up for the clear and secured high register still it is better slotted and more vibrant than before with a lacquered bell.
Cosmetically, my horn is a screw bell China mass production more nickle and a trace of silver i guess, so did not tarnish yet, but I am taking fingerprints with cloth anyways (playing french horn right hand holds the bell).
What i am thinking to compare is my Giardielli mouthpiece that gets haze as oppose to my old blessing that newer gets haze because it has almost no silver in coating.
Did you relaquer it?
Will a Spray Paint Graffiti Remover do the job?
What The product ia this?
A few thoughts. Different "lacquers" require different strippers. I had a fairly new XO trombone in the shop. I always abrade the lacquer finish to increase the stripping efficiency. After 1.5 hours in a 160 deg hot strip tank, nothing changed! I put it in my acid tank and in 5 minutes it was gone!
Ceramic, epoxy, powder coat, nitro cellulose all different.
Thoughts on lacquer and sound. A silver trumpet has about .5 mil thickness in plating or .0005" that's 5 ten thousandths thickness. Nitrocellulose lacquer is that same thickness after it has dried and flashed off. Epoxy lacquers, 2 parts, powder coats no not look as good and are more like .001" or more in thickness.
All finishes are temporary and their last depends on care, handling and mostly a persons body chemistry. I refinish horses. See my channel.
Thanks.
Is there a reason why you chose to not take the lacquer off the bell?
Thanks for your comment. As the lacquer inside of the bell was not so deteriorated and was in good shape, I choose not to take the lacquer off. The contrast of lacquer in dark gold against polished raw brass in bright gold is beautiful.