I actually just bent some Madagascar sides with my typical 230-300 degree swing (start around 230, cap it around 300), and they got REALLY dark. Wish I would have seen this last week!
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| BRW sides darken during bending http://w-ww.luthiersforum.com/forum/viewtopic.php?f=10101&t=52930 |
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| Author: | guitarjtb [ Thu Feb 13, 2020 10:04 am ] |
| Post subject: | BRW sides darken during bending |
Has anyone experienced Brazilian rosewood sides darkening, due to the heat, during bending, and then not matching the back in color? What is the solution when that happens? |
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| Author: | Mike Franks [ Thu Feb 13, 2020 11:45 am ] |
| Post subject: | Re: BRW sides darken during bending |
I have experienced this on many occasions, especially with BRW that has very high resin content. The heat from the bender will also fade the brick orange/red color. Fortunately, much of the color will return and lightening of the wood will happen after you scrape and sand the sides. You can mitigate the color loss and darkening by being very mindful of the heat during bending. I try to limit to 250 F max or even a bit lower temp. Try to stay away from products like super Soft because they really leach out the color of BRW. Mike Franks http://www.mjfranksguitars.com |
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| Author: | Woodie G [ Fri Feb 14, 2020 7:33 am ] |
| Post subject: | Re: BRW sides darken during bending |
As mentioned in previous posts on bending, rosewoods do not benefit from use of veneer softeners like SS-2, and higher resin content woods like cocobolo and better Brazilian will bend at very low temperatures, avoiding the resin bleed mess and excessive oxidation. When I was at Greenridge, the preferred method to avoid any color differences with cocobolo bindings, etc. - which has a much more pronounced color change than Brazilian at significantly lower temperatures - was to sticker and weight the back, head plate, tail graft, etc. and to bake at the same temp as the binding, sides, etc. for roughly the same duration. A couple of ramekins at the bottom of the oven filled with water kept things from oven-drying at the 250 degree bending temp mentioned by Mr. Franks. Allowing the over to cool to room temperature after the treatment avoids any heat-related distortion. |
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| Author: | James Orr [ Fri Feb 14, 2020 2:03 pm ] |
| Post subject: | BRW sides darken during bending |
I actually just bent some Madagascar sides with my typical 230-300 degree swing (start around 230, cap it around 300), and they got REALLY dark. Wish I would have seen this last week! Sent from my iPhone using Tapatalk |
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| Author: | bluescreek [ Sat Feb 15, 2020 7:14 am ] |
| Post subject: | Re: BRW sides darken during bending |
windex doesn't darken . I stopped using ss2. you can use any wood bleach to lighten |
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| Author: | Mike OMelia [ Sat Feb 15, 2020 10:25 am ] |
| Post subject: | Re: BRW sides darken during bending |
bluescreek wrote: windex doesn't darken . I stopped using ss2. you can use any wood bleach to lighten Windex original (blue, ammonia)? Does it lift oils like SS2? |
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| Author: | bluescreek [ Sat Feb 15, 2020 10:48 am ] |
| Post subject: | Re: BRW sides darken during bending |
use ammonia D windex it does a good job with minimal water staining. I also don't use foil I am a paper guy Prefer untreated butchers paper. |
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| Author: | Mike OMelia [ Sat Feb 15, 2020 11:28 am ] |
| Post subject: | Re: BRW sides darken during bending |
bluescreek wrote: use ammonia D windex it does a good job with minimal water staining. I also don't use foil I am a paper guy Prefer untreated butchers paper. Have u ever noted blue staining on light colored woods? |
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| Author: | bluescreek [ Sat Feb 15, 2020 5:55 pm ] |
| Post subject: | Re: BRW sides darken during bending |
never use it all the time instead of water. |
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