RE: Bogdanovich´s method for flamenco guitars (Full Version)

Foro Flamenco: http://www.foroflamenco.com/
- Discussions: http://www.foroflamenco.com/default.asp?catApp=0
- - Lutherie: http://www.foroflamenco.com/in_forum.asp?forumid=22
- - - RE: Bogdanovich´s method for flamenco guitars: http://www.foroflamenco.com/fb.asp?m=317819



Message


aaron peacock -> RE: Bogdanovich´s method for flamenco guitars (Apr. 29 2020 22:25:42)

That is an impressive build (your first!?) and a lovely guitar, Jonas.
I'd be quite proud of that.




Andy Culpepper -> RE: Bogdanovich´s method for flamenco guitars (Apr. 29 2020 23:33:01)

Jonas, I agree with HR that those holes look a little big. I use a #51 drill, a little over 1.5 mm. It is possible to "move" string holes on a completed bridge using abrasive cord, but that also widens them a little and should be a last resort.




mango -> RE: Bogdanovich´s method for flamenco guitars (May 2 2020 23:57:05)

Thank you for your help! The second try was much more successful. I did as you said with a bit of CA, an awl and a smaller drill bit. I also came back to a six hole design with a shorter distance between the saddle and the tie block. The wings are now 3.6mm thick. I just gave it a quick coat of shellack. Will that be enough to prevent it from bleeding colour to the soundboard? Bogdanovich first does the shellac finish of the whole guitar before he glues on the bridge. But I like to do it the other way round to be able to put some strings on and listen to the unfinished guitar.



Images are resized automatically to a maximum width of 800px




mango -> RE: Bogdanovich´s method for flamenco guitars (May 2 2020 23:58:17)

quote:

That is an impressive build (your first!?)


Thanks! Yes my first :-)




mango -> RE: Bogdanovich´s method for flamenco guitars (May 3 2020 10:01:57)

Do we actually want the bridge as light as possible for flamenco guitars? I mean to allow more amplitude in vibration and fast response?

Another question... do I have to do something to the soundboard before I glue the bridge to prevent colour bleeding?




RobF -> RE: Bogdanovich´s method for flamenco guitars (May 3 2020 11:14:29)

quote:

Do we actually want the bridge as light as possible for flamenco guitars?


From an earlier reply of mine: “ Remember, the bridge is also a brace; it doesn’t hurt for it to have some mass, there is a sweet spot to the weight and going lighter after that can work against it.”

This was buried in the paragraph where I was cautioning not to go too thin on the wings. There is no one answer to any specific weight, as going lighter or heavier depends on factors such as the characteristics of the top and the execution of the bracing. At this phase it’s probably wise to simply focus on being structurally sound and following standard dimensions. The weight will fall out of that and shouldn’t be the focus of the design. Just my two cents...




mango -> RE: Bogdanovich´s method for flamenco guitars (May 3 2020 12:58:08)

Ah yes, you wrote that... sorry. Well I will leave it as it is now. What about colour bleeding? Do I need to put some shellack on the top as well before glueing? Well, of course not at the glueing surface, but around somehow?




Andy Culpepper -> RE: Bogdanovich´s method for flamenco guitars (May 4 2020 0:51:39)

To seal Rosewood I use a little folded up piece of t-shirt and wipe on shellac until no more color comes off. If there is still some color coming off the bridge, you can use *delicate* painter's tape to mask off the top right around the bridge and keep sealing it.




mango -> RE: Bogdanovich´s method for flamenco guitars (May 4 2020 7:09:02)

quote:

you can use *delicate* painter's tape to mask off the top right around the bridge and keep sealing it.

So you do that when the bridge has already been glued on?




Andy Culpepper -> RE: Bogdanovich´s method for flamenco guitars (May 4 2020 17:57:46)

quote:

So you do that when the bridge has already been glued on?


Yes.




Tom Blackshear -> RE: Bogdanovich´s method for flamenco guitars (May 4 2020 17:58:37)

quote:


So you do that when the bridge has already been glued on?


Yes, you can apply quick light coats of shellac, allowing them to dry quickly between coats until built up enough to apply heavier coats. Then proceed with the rest.

You might want to tape off the bridge while doing the light coats first.




mango -> RE: Bogdanovich´s method for flamenco guitars (May 13 2020 22:14:56)

First try on the unfinished guitar :-) Very exciting moment. Sound is very blanca like. Very good highs, growling basses, fast attack... I am very happy so far. Now is time for the finish... well I guess I will have to read the chapter about shellack polishing again... how was that...? First a thin coat on the dark woods... then grain filling with pumice... first thin coats... oil only in the end... how long do I have to wait between the coats?



Images are resized automatically to a maximum width of 800px




Tom Blackshear -> RE: Bogdanovich´s method for flamenco guitars (May 14 2020 15:30:07)

quote:

how long do I have to wait between the coats?



Wait until they are dry to the touch, not sticky. This way you'll add to the coats rather than wipe off the preceding coats.




mango -> RE: Bogdanovich´s method for flamenco guitars (May 14 2020 15:37:36)

But that dries quite quickly... just a few minutes... that's enough?




JasonM -> RE: Bogdanovich´s method for flamenco guitars (May 14 2020 16:05:08)

Mango! Looks really nice! Such an exciting moment to put those strings on that box for the first time , right? I want to reach through the picture and play it.

Keep going until you can’t stand it anymore than let if gas off

The initial wash coats dry pretty fast especially when you are using a lighter cut. Pablo Requenas video series on polishing on YouTube? It’s pretty good, his way is one of many and he gives some general guidelines on how far you should go each session but so many variables.




Tom Blackshear -> RE: Bogdanovich´s method for flamenco guitars (May 15 2020 2:49:03)

Yes, the first few coats dry quick and then they need to dry longer as you go.




Stu -> RE: Bogdanovich´s method for flamenco guitars (May 15 2020 9:03:12)

Awesome! Guitar looks lovely. Yeah Jason.ha.I have that urge to reach in as well!
Cool rosette

Good work.Well done




mango -> RE: Bogdanovich´s method for flamenco guitars (May 17 2020 12:39:18)

Thanks Guys!
Yes I watches Pablo Requenas Videos about French polishing. So I will fill the pores with pumice powder later when I start polishing with oil? First some buildup without oil or pumice right?

Another thing. I found it very difficult to sand the soundboard without rubbing the ebony dust from the bindings into the soundboard... Is there a technique that I am not aware about to do that?




JasonM -> RE: Bogdanovich´s method for flamenco guitars (May 17 2020 15:41:24)

You can sand close to the binding and then finish by sanding off the edge of the top in one direction. That way you don’t pull the black dust back onto the soundboard.

For pumice, I don’t think you want to have oil on the surface, you just need some coats of Dry shellac on there for the pumice to grind up and Push into the pores




mango -> RE: Bogdanovich´s method for flamenco guitars (May 25 2020 10:48:36)

Getting closer with my French polish... its far away from perfect, but as this is my first try, I'm ok as it looks already. Well I obviously rubbed some fibres and dirt into it, bus as there are many "first try spots" visible in this guitar it fits very well ;-)

How long should it dry in the end before I put on the golpeador?




Andy Culpepper -> RE: Bogdanovich´s method for flamenco guitars (May 25 2020 17:14:38)

Congrats, stringing up your #1 for the first time is a really special moment. Let's see the finish [:)]




RobF -> RE: Bogdanovich´s method for flamenco guitars (May 25 2020 17:35:40)

quote:

How long should it dry in the end before I put on the golpeador?


I don’t want to give a bad answer. The short and easy response is to wait as long as you possibly can. I generally wait at least a week, then do a clean up and final polish before applying it. The main thing is to be sure to wait long enough for any oils that might be trapped in the shellac to rise to the surface so they can be wiped off. Naphtha can be used to clean off any oil residue, but the polish I use seems to serve the purpose.




ernandez R -> RE: Bogdanovich´s method for flamenco guitars (May 25 2020 19:14:11)

She sure looks nice in the white, sure she looks better with the shellac!

Couple things: shellac takes some time to dry, about a year really, and shrinks up exposing all manor of flaws. Best to wait a couple weeks at least before applying the tap plate so you are sure your are happy with the finish.

Might really wait a month... use a temp tape on golpeador.

Took about 6-9 monthes for the shellac to really cure up and then the guitar brightens up some, a lot on others. She might sound a little flat once you strung her up so don't be surprised.

Thinking you are building a fairly stiff box, mine are 1000gram lightweights so your mileage may vary?

Of course keep in mind I've only done a handful with the last one being the first I would show friends and family ;)


HR




mango -> RE: Bogdanovich´s method for flamenco guitars (May 25 2020 22:05:39)

Wow, patience seems to be luthiers most important ability right? ;-)




Andy Culpepper -> RE: Bogdanovich´s method for flamenco guitars (May 26 2020 1:08:32)

For what it's worth, here's my French polish timeline (after pores have been filled):

1. Bodying: 6-8 days of two short 20-30 minute sessions per day building up shellac on the whole guitar. No oil.

2. One week of drying

3. One day to wet sand to level with 1000 grit

4. Two days of polishing with thin shellac and oil, with t-shirt covered muñeca. One hour-long session each day.

5. One week of drying

6. Polishing compound to remove oil, then stick golpeador and string up.

The whole thing takes about 4 weeks, but as it's been said before the "perfect" FP could easily take up to a year.




ernandez R -> RE: Bogdanovich´s method for flamenco guitars (May 26 2020 3:07:05)

While the shellac is between processes you start building another guitar ;)




mango -> RE: Bogdanovich´s method for flamenco guitars (May 26 2020 11:21:48)

quote:

While the shellac is between processes you start building another guitar ;)


I actually thought about that... anyway I will have to build a Negra and a classical one as well... ;-)




mango -> RE: Bogdanovich´s method for flamenco guitars (May 26 2020 11:27:18)

quote:

1. Bodying: 6-8 days of two short 20-30 minute sessions per day building up shellac on the whole guitar. No oil.

2. One week of drying

3. One day to wet sand to level with 1000 grit

4. Two days of polishing with thin shellac and oil, with t-shirt covered muñeca. One hour-long session each day.

5. One week of drying

6. Polishing compound to remove oil, then stick golpeador and string up.


Wow... o... k... looks like I have to slow down a bit. My timetable was more like

1. Messing around with bad polishing clothes

2. Buying other ones

3. Rubbing dirt into the wood

4. Wait five minutes

5. messing around with olive oil

6. noticing that the polish was too thick

(...) ;-)

well actually it was not that bad but I definitely need to be more patient. Thanks for sharing your method!




mango -> RE: Bogdanovich´s method for flamenco guitars (May 26 2020 11:30:01)

This it how it looks now. Still rubbing around with the oil... getting better results now with a bit of sanding in between and with thinner shellac. Still hard to wait...









Images are resized automatically to a maximum width of 800px




mango -> RE: Bogdanovich´s method for flamenco guitars (May 26 2020 11:35:13)

There was a gap at the butstrip which I successfully filled with pumice powder, but unfortunately I rubbed to hard so that I took some of the black colour and smeared it around :-/ Don´t want to do everything again... Do you think its ok for a #1 guitar?

Also I find it hard to get rid of these little buildups around the bridge. I sand them down but they come back as soon as I add another coat... how can I do that?

Thanks!





Images are resized automatically to a maximum width of 800px




Page: <<   <   3 4 5 [6] 7    >   >>

Valid CSS!




Forum Software powered by ASP Playground Advanced Edition 2.0.5
Copyright © 2000 - 2003 ASPPlayground.NET