I am making a conference table top 44" diameter x 29" high. What would be the best material to use, besides solid: particleboard or MDF? I made one top table using particleboard, with 5-ply veneer construction, high sheen rubbed finish on top, and on the back of the top table, we used sealer and stain only. The problem after finishing was the top cupped (convex). Can anyone suggest how to avoid cupping on the top table?
(Furniture Making Forum)
From contributor N:
Please clarify "5-ply veneer construction... and on the back of the top table... sealer and stain only." It sounds like you put 5 layers of veneer on particleboard, which doesn't make sense to me. When you say the back (bottom) of the table had sealer and stain only, do you mean sealer and stain on veneer or on exposed particleboard?
Your table cupped because you created a moisture imbalance by not putting the same amount of finish on the underside, and I suspect you didn't veneer it either. Remember, what you do to one side of a panel, you need to do the same to the other. If you do that, your problems should be minimized.
What I used on my conference table:
1. Face veneer (crotch mahogany)
2. Cross band
4. Cross band
5. Back veneer (Q/cut mahogany)
On the back veneer (Q/cut mahogany), we put sap stain, smoothcoat, and high-solid sealer. On the top (crotch mahogany), we did very high sheen (gloss) rubbed finish.
Contributor J, you are correct about the moisture imbalance by not putting the same amount of finish on the underside. The problem is on the top of the table, we did high gloss rubbed finish. What finish should we do on the underside?
Why did you do all that crossbanding? Was the crotch material really wrinkly or something? Seems unnecessary to me.