Darryl Keil Last Activity 2025-09-09 11:09 AM
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Mitch

 
Subject : Book matched barber poll effect
Posted : 2005-12-09 12:18 AM
Post #32627
I'm using bookmatched anigre to cover 8 flat doors. I've noticed that after finishing, that one side is darker than the other. I'm using a analine dye, followed by an oil finish. I've google around and have found that this is a common problem - common enough to have a name: barber pole. Luckily I'm stilll just making test pieces.

Well googling around has also failed to turn up any good solutions. Before I turn to slip matching I'm wondering if anyone has any ideas to at least minimize this effect (I like the symmetry of the book match). The wood is quarter sawn with some curl and I think that whatever I do to minimize the barber pole effect might also minimize the curl. Any suggestions?


 
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Darryl Keil

Posts: 1455

Joined: 2003-05-22
Location: Maine

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Subject : RE: Book matched barber poll effect
Posted : 2005-12-09 7:58 PM
Post #32631 - In reply to #32627
Mitch,

Its the way the veneer comes of the knife as its being sliced. One side is called "compressed" and the other "pulled". As you book match this pulled, compressed, pulled, compressed, effect will always give you the look you are talking about. Some veneers more than others.

About the only way I can see to neutralize this look to some extent is through staining. If you want the full natural look then its just something you have to live with unless you want to go to slip matching. On quarter sawn veneer this is not so noticeable.

Sincerely
Darryl Keil


 
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Mitch

 
Subject : RE: Book matched barber poll effect
Posted : 2005-12-11 10:09 PM
Post #32633 - In reply to #32631
Problem solved - sort of.

I took the panel that I had been exhibited the barber pole effect, and rotated it 180 degress (so that the bottom edge os not the top edge). Stranglely enough the problem went away! Since the panels will all be used as door on base cabinets, I think that this should work for me.

BTW, Dave at B&B woods (where I bought the veneer) said it is because the rays in the wood intersect the plane of the veneer at an angle. Thus on one side of the book match the rays head up, and the other side they run down.


 
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Trosey

Posts: 7

Joined: 2004-12-20
Location: Texas

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Subject : RE: Book matched barber poll effect
Posted : 2005-12-12 9:49 AM
Post #32634 - In reply to #32633
Mitch,

You may consider changing your finish schedule. A wash coat of shellac can help a lot. Then use a pigment stain followed with a top coat. The "loose" side of the veneer contains "lathe checks". These checks will trap more pigment stain that the "tight" side. They will also absorb more aniline dye in the checks. This shows up as a lot of small lines in the "loose" side.

Another finish schedule would be to use a "toner" after the wash coat of shellac.

Trosey


 
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Mitch Barker

 
Subject : RE: Book matched barber poll effect
Posted : 2005-12-14 8:28 PM
Post #32636 - In reply to #32634
Trosey,

I was thinking of trying shellac. As a matter of fact I think that is one of the few finishes I haven't tried. (I've been tinkering wth sample finishes for months). However, I still can easily see the effect even before any finishes at all. Perhaps shellac can make the diffs less noticible. Ironically, I'm trying to emphasize the curl, which in the end probably emphasizes the barber pole effect.

I see you're from TX. I used to live in Austin back in the 70's and 80's. Great town.

Mitch


 
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Trosey

Posts: 7

Joined: 2004-12-20
Location: Texas

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Subject : RE: Book matched barber poll effect
Posted : 2005-12-15 2:43 PM
Post #32637 - In reply to #32636
You could use shellac or lacquer for the wash coat. Either should fill the "lathe check". Then use the pigment stain or a shellac toner or a lacquer toner.

Any of the above should NOT obscure the curl. Run a lot of tests.

I have a son that lives in Austin. Most young people love it.


 
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Mitch

 
Subject : RE: Book matched barber poll effect
Posted : 2005-12-15 11:13 PM
Post #32638 - In reply to #32637
When you say "wash coat", does that refer to the cut? Could I mix up a wash coat by diluting a can of shellac I by at the HW store?




 
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Don Stephan

Posts: 825

Joined: 2003-07-18
Location: Cincinnati, Ohio

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Subject : RE: Book matched barber poll effect
Posted : 2005-12-17 4:18 PM
Post #32639 - In reply to #32638
Mitch:

An article in the Jan/Feb 2006 issue of Fine Woodworking discusses wood "luster" (the light and dark effect) and how to enhance or decrease luster with finishes. The article, "Inner Fire" by Thomas Schrunk is found on pp 26-30.
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