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Is This Mineral Streaking Acceptable for A1 Maple Plywood?

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Forum topic by lilmanmgf posted 08-05-2016 02:11 PM 910 views 0 times favorited 18 replies Add to Favorites Watch
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lilmanmgf

9 posts in 126 days


08-05-2016 02:11 PM

Hi,

I just purchased the wood for my first big woodworking project, a large computer desk. For the base material of the cabinets and table top I am using A1 Grade Maple Plywood which I purchased at my local lumber yard. One of the two sheets is free from any defects in the face veneer. Unfortunately the piece which they cut for my table top seems to have a fair amount of what I think is mineral streaking, which I didn’t notice until I brought it home. Based on the grading system it says that “slight mineral streaking” is permissible for grade A1 plywood. I have no expertise here so any qualitative measurement is difficult for me to interpret. Does the provided pictures look like “slight mineral streaking” or more excessive. This stuff cost $99 per 4’x8’ sheet, so I want to make sure I’m not getting hosed.


18 replies so far

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BurlyBob

3695 posts in 1731 days


#1 posted 08-05-2016 02:16 PM

Photo #4 & 6 look more like a boot prints to me. You might try a light sanding with some 220 to see if it’s just dirt.

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lilmanmgf

9 posts in 126 days


#2 posted 08-05-2016 03:01 PM

I was able to remove the dirt with light sanding. I was referring to the dark brown/black thin streaks that run parallel with the grain. It’s possible I’m not using the right term.

View johnstoneb's profile

johnstoneb

2147 posts in 1639 days


#3 posted 08-05-2016 03:25 PM

If you don’t want that streaking take it back and exchange it. Personally it adds a little to the plywood. Maple can be awfully bland. It doesn’t look like very much streaking to me.
I see you had it precut no exchange. The lumberyard does not grade the plywood it comes to them in a bunl pregraded.

-- Bruce, Boise, ID

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ScottM

346 posts in 1612 days


#4 posted 08-05-2016 03:55 PM


...Personally it adds a little to the plywood. Maple can be awfully bland. It doesn t look like very much streaking to me….

- johnstoneb

^^ I agree, I like it. Wood is not perfect. Enjoy what it gives to the project.

BTW, Bruce I lived in Mountain Home for about 5 years. Miss that place every now and then…

View jbay's profile

jbay

816 posts in 365 days


#5 posted 08-05-2016 04:01 PM

I would consider it being slight.
Not to be rude but, did you pick it out, and if not you should have. That way you have control of what you get, especially for 99.00 a sheet.
Is this project going to be natural or is it getting a stain color?

-- My “MO” involves Judging others, playing God, acting as LJs law enforcement, and never admitting any of my ideas could possibly be wrong or anyone else's idea could possibly be correct -- (A1Jim)

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lilmanmgf

9 posts in 126 days


#6 posted 08-05-2016 05:32 PM



I would consider it being slight.
Not to be rude but, did you pick it out, and if not you should have. That way you have control of what you get, especially for 99.00 a sheet.
Is this project going to be natural or is it getting a stain color?

- jbay

I’ll take it as a lesson learned for the future. This place isn’t like home depot where everything is on the shelves, and I wasn’t even aware that was an option. I told them I was planning on using the 2’x8’ for a table top and I assumed they would pick something accordingly. Bad assumption apparently.

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Fred Hargis

3947 posts in 1959 days


#7 posted 08-05-2016 05:45 PM

It’s all in the eyes of the beholder (or something like that). I would use the part you see as “mineral streaking” prominently in the desk; I find it quite appealing.

-- Our village hasn't lost it's idiot, he was elected to congress.

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skatefriday

380 posts in 948 days


#8 posted 08-05-2016 06:06 PM

I’d be disappointed if my lumberyard pulled out an A1 sheet and it had that much streaking. However A1 is only graded A on one side. What’s the other side look like?

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lilmanmgf

9 posts in 126 days


#9 posted 08-05-2016 06:15 PM



I d be disappointed if my lumberyard pulled out an A1 sheet and it had that much streaking. However A1 is only graded A on one side. What s the other side look like?

- skatefriday

That is the A face side. The back side has worse streaking and variation in color. It’s in line with the 1 side of the grading, but defiantly worse than the pictures I posted.

View Tony_S's profile

Tony_S

607 posts in 2549 days


#10 posted 08-05-2016 10:43 PM

Looks excessive for an A face to me. I buy the stuff by the lift (A4 typically) Both 1/4” and 1/2”. If better than say 5% of the lift looked like that, I’d be on the phone.

-- It is the mark of an educated mind to be able to entertain a thought without accepting it. Aristotle

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bondogaposis

4035 posts in 1817 days


#11 posted 08-06-2016 12:21 AM

It looks like the rotary cut side, the other side is the good side.

-- Bondo Gaposis

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lilmanmgf

9 posts in 126 days


#12 posted 08-06-2016 01:10 AM



It looks like the rotary cut side, the other side is the good side.

- bondogaposis

This is what I assumed is the front side:

This is what I assumed is the rear side:

Is that correct? From everything I read it said knots were not permitted on A side plywood, so I would assume the small knot would rule out the one side. Also looking at the second sheet, is it normal for the grain to not parallel to the 8’ length of the board? This is a 48” by 36” cut where the grain appears to run parallel to the 48”/4’ side. It also appears that both front and back are continuous rotary cuts. Murphy is the manufacturer. Do they just have lower standards?
Front:

Back:

Marking:

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skatefriday

380 posts in 948 days


#13 posted 08-06-2016 02:50 AM

I wouldn’t like that, but then again the typical lumber yard caters to the trade and wants you to buy the entire pallet. If I got a sheet like that I’d try to make the best of it, but wouldn’t return it as I’ve spent the better part of two years developing a relationship with the guys behind the desk so that they know if I’m picking through their 4/4 maple I’ll leave it as I found it, not making a mess. A single sheet of 3/4” A1 combi-core/classic-core maple would have to be pretty bad for me to say anything about it. And if you develop that relationship you can ask them to pull from 4 or 5 sheets down as the top sheet is often a return.

And as an aside remember that you didn’t buy that at Home Despot. And it’s not entirely your lumberyard’s fault and they make very little money on a single sheet after having to pay a forklift guy to go pull the material, drive it out to your truck, and help you load it.

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lilmanmgf

9 posts in 126 days


#14 posted 08-06-2016 03:00 AM



I wouldn t like that, but then again the typical lumber yard caters to the trade and wants you to buy the entire pallet. If I got a sheet like that I d try to make the best of it, but wouldn t return it as I ve spent the better part of two years developing a relationship with the guys behind the desk so that they know if I m picking through their 4/4 maple I ll leave it as I found it, not making a mess. A single sheet of 3/4” A1 combi-core/classic-core maple would have to be pretty bad for me to say anything about it. And if you develop that relationship you can ask them to pull from 4 or 5 sheets down as the top sheet is often a return.

And as an aside remember that you didn t buy that at Home Despot. And it s not entirely your lumberyard s fault and they make very little money on a single sheet after having to pay a forklift guy to go pull the material, drive it out to your truck, and help you load it.

- skatefriday

That is fair, and I will hold onto this sheet. I just discovered though that my “second sheet” is actually wood from three different sheets of plywood. I asked for the second sheet to be cut into two 48”x30” sheets and one 48”x36” sheets. Had they cut it from a single sheet, the grain would run perpendicular to the 48” edge and would end up vertical on my cabinets. What they gave me were cuts from 3 different sheets of plywood where the grain runs parallel to the 48” edge. This will my the grain on all my cabinets run horizontal.

View Tony_S's profile

Tony_S

607 posts in 2549 days


#15 posted 08-06-2016 10:01 AM

Referring to post #12
Photo #1,2,3.
That would be the A face. It’s a rotary cut veneer. Most wholesalers refer to it as ‘whole piece face’. It may be stamped on the edge WPF.
With maple, it’s one of the most common veneer cuts for an A face. It eliminates the ‘barber pole’ effect you get with maple veneer when it’s book matched.

Photo’s #4,5,6.
This is the Back face. You can see a joint in the veneer in all three photo’s, and mismatched veneer’s, called a ‘random match’.
A random match is allowed on the 1(back) face as long as the individual veneer’s fall within grade 1 specs.

With all this chat about grading….realize, that to a certain degree, it’s all a bunch of arbitrary bullshit. There are no veneer cops. Typically any respectable plywood mill is a member of ‘HPVA ‘(hardwood plywood and veneer association). And they all agree on set grading(and other) standards, but even the best mills will SOMETIMES push the grading limits. Some mills constantly push them. The best mills will (most) often set there standards slightly higher than HPVA standards. You pay for it though.
Simply put…if your looking for near perfection, simply ordering an A face is no guarantee.
If your fussy…ask to see the product first.

-- It is the mark of an educated mind to be able to entertain a thought without accepting it. Aristotle

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