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#81 |
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diyAudio Member
Join Date: Jan 2003
Location: USA
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Well nevermind... I should have read a little more before I spoke
The flyer that came with the dye says a 50-50 mix of denatured alcohol and lacquer. Now, new question. Are there different kinds/brands of laquer that are better than others for this use?-Wes
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Anything worth doing is worth doing right... and redoing to make it better... and again to fix it back the way it was. |
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#82 |
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diyAudio Member
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Stop the presses bud.
Thin with the dye 100% alcohol only!!! Sprayed onto raw wood will work. But for your purposes tint some laquer. It will end up working as a shading stain. The laquer will give it a good degree of tranparency and give you wonderfull depth of finish. And yes ethanol is good. Just don't be tempted to sneek a sip. To dye , to sleep that is the question! ( scary shakespeare flashback) If you must dye do it quietly and please don't make it messy. ( I'm to sharp this morning ) To recap the dye idea: NUMBER ONE RULE: AFTER FILLING THE GRAIN SAND VERY SMOOTH! 180 to 220 GRIT next..... The background is the open pored wood. It will be darkest. The foreground will be the lighter more closed grain wood. Therefore it should be lighter. The tint/laquer mixture will be for shading purposes only. Not the final top coats. Start with a 25% tint and build it up in layers. Or try a test with the 50%. But practice first. The 50% is the maximum allowed in a laquer mix. The idea is to build up a depth of transparent colour. If you do it right it is awesome. Plaster must be dyed darker than the foreground colour. The filled areas will set off the contrast that you desire. After the filler process you should brush or spray a coat or two of shellac. This will seal the plaster. Next you can spray the dye. The dye should be mixed with laquer as mentioned. And it should be sprayed within about twenty minutes of the shellac coats. It will bond better. ( your plant sprayer is highly recomended as long as the spray patern is even. Practice on some card board with some water. You will soon figure it out.) This shading stain will darken or deepen the colour that you will have allready started with. To understand what is happening think about it this way. The dyed plaster will have become entangled in all the wood grain. Some of the more open areas will be quite dark the more closed grain areas will be more of a grey. This is before shading with the dye on top of the shellac coats. If you want a deeper colour then after the mentioned sealing process you can try shading the foreground with the laquer tint mix. When you think that you are happy switch from tinted laquer to a clear laquer. If you followed the number one rule then you will be able to get away with two or three coats of clear. After they have dried for a while ( a couple of hours at least. Better over night ) wet sand the surface with some 400 or 600 paper. By wet I mean water with a drop or two of dish soap for every 500 ml. This will keep the surface cool and lubricated and the paper cleaner. One more tip. Get yourself a black of MDF and cut it out so that a quartered sheet of sand paper covers it comfortably. It should be slightly shorter than the paper and the paper should wrap around the edges so that when your grasp the black you hild the paper. Now seall the blck with something. If you have it, polyurethane is the best.( more water proof than shellac or laquer ) Use this block for all of your sanding from the get go. You will have a much more problem free finish. Sanding with hand pressure on paper is a NONO! On veneer your hands will cause the open pore areas to become sunken due to their being softer. With a block this does not happen. Finishing 101 is now over. The next step will be finishing 201. Remember this. Anyone can make a mistake. It takes a true craftsman to fix them! Mark
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Mark |
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#83 | |
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diyAudio Member
Join Date: Aug 2003
Location: San Francisco, CA
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Quote:
Can you expand your explaination a bit. For example, I butt-jointed two 3/4" plywood at 90 degree to each other. Are you saying that there is a way for me to use one continuous piece of veneer to cover the two surfaces that are jointed together at 90 degree? Do I need to use a router and router a radius at the joint? |
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#84 | |
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diyAudio Member
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Poor cats.
OK how to do this. Check out the crude drawing. THe blue is the speaker or whatever you are going to veneer. Note that on the corner there is a small chamfer ( small as in less than a 1/8th radius ) or even a rounding of the corner. This allows the thicker veneer to wrap around the corner with less of a tendencie to break. The underlying idea is to allow for the more or less double thickness of the veneer some room to bend without the cracking that would normally occur. There are other ways as well: Quote:
Mark
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Mark |
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#85 |
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diyAudio Member
Join Date: Jan 2003
Location: USA
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Thanks Mark,
I picked up some plaster of paris from home depot this afternoon. In typical home depot salesman fashion, they where no help regarding the dye. They told me that they have "no dyes whatsoever." I was thinking RIT dye... something like this maybe? http://www.ritdye.com/store/dye_powder.asp Although I have no info about how if responds to wood, colorfastness, fade resistance, what will happen with finish... grrr too many questions. And on a side note, I was using titebond wood glue to seal the edges where my boards don't line up quite right. The bottle says "sands easily" All I have to say is: "LIES BLOODY LIES." I can think of many better descriptions, such as "sands like mud" or maybe "sands like silicon". Epoxy sands way better. I am doing something wrong... I do have a rather thick layer built up to make the seal (approximately 1 mm) but come on! I was wacking away with a belt sander and 40 grit for 20 minutes! Sigh, I need to breath/sleep/get the stupid valet parking attendent not to crash my car into a concrete post!!! Oh well, another story another time. Thanks for all the help - sorry for the rant. -Wes
__________________
Anything worth doing is worth doing right... and redoing to make it better... and again to fix it back the way it was. |
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#86 |
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diyAudio Member
Join Date: Jan 2003
Location: USA
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OK, so these pictures are from my first run at it. I'm not really satisfied with the result so I plan on ordering some more samples and trying again.
My process was as follows: 1) Brush with H20 to lift the grain 2) Plaster of Paris mixed with black RIT dye. 3) Sand back with 200 grit to expose the grain 4) Zinzer seal all wax free shellac sealer (2 coats) 5) Brushing lacquer mixed with transtint black dye (2 coats) The different bands are different concentrations of dye in the lacquer. And the grain isn't quite that prominent, but is brought out more by the camera flash.
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Anything worth doing is worth doing right... and redoing to make it better... and again to fix it back the way it was. |
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#87 |
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diyAudio Member
Join Date: Jan 2003
Location: USA
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This is without the flash
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Anything worth doing is worth doing right... and redoing to make it better... and again to fix it back the way it was. |
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#88 |
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diyAudio Member
Join Date: Jan 2003
Location: USA
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And a close up of the grain
__________________
Anything worth doing is worth doing right... and redoing to make it better... and again to fix it back the way it was. |
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#89 |
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diyAudio Member
Join Date: Jan 2003
Location: USA
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Ok, now come the questions! (I know you're excited
1) I want to get more contrast between the black background and the lighter wood grains. How might this be accomplished? (I was thinking of three options... 1) Putting another application of dyed plaster and sanding again or 2) Brushing alcohol/dye after the pore filling, but before the shellac and then sanding it back again. Although I tried mixing the dye directly with the plaster and it did not work at all. So I don't think this would work. 3) Maybe some tung oil before the shellac? As you can see from the pictures, There was OK contrast after the shellac, but the tinted lacquer just turned everything darker... Unfortunatly, without it, there was no depth to the colors. Basically, the black needs to be blacker and the gold needs to be golder. 2) As you can see from the pictures, the filled areas still look rather "grainy". Is there a way to make them more uniform... perhaps not sanding back as much? 3) I don't know how they do this, but the B&W speakers have a quality of looking almost completely black until direct light is shined on them. Then the grains really "pop" like the tigers eye stones. Is there anyway to get this effect? Thanks again for all your help and expertese. -Wes
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Anything worth doing is worth doing right... and redoing to make it better... and again to fix it back the way it was. |
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#90 |
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diyAudio Moderator
Join Date: Apr 2002
Location: Chatham, England
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Well, you could try using an amber stain in your top coat, that would help the highlights. For a darker background, try more coats of black stain, with or without the plaster. Different brands of black stain also give different results, some work better with certain woods. I can't really advise on a particular type, as you have different types in the US to what we have in the UK.
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