I have a couple of pieces of timberboard (the stuff made from strips
glued together) one 400mm wide one 300mm. To be used as a shelf along
the top of some boxing in a bedroom.

It's been sitting around in the house quite happily for a few months and
was still nice and flat. Today I stained it with a couple of coats of
Colron wood dye and now it has bowed (or cupped?) quite noticeably -
inwards on the stained side. doubly annoying as I was hoping to install
it and paint the walls this weekend

This doesn't seem to be something to be expected - but any comments
before I complain about it
--
Chris French

On 10/07/15 21:16, Chris French wrote:
I have a couple of pieces of timberboard (the stuff made from strips
glued together) one 400mm wide one 300mm. To be used as a shelf along
the top of some boxing in a bedroom.

It's been sitting around in the house quite happily for a few months and
was still nice and flat. Today I stained it with a couple of coats of
Colron wood dye and now it has bowed (or cupped?) quite noticeably -
inwards on the stained side. doubly annoying as I was hoping to install
it and paint the walls this weekend

This doesn't seem to be something to be expected - but any comments
before I complain about it

so stain it on the other side as well

--
New Socialism consists essentially in being seen to have your heart in
the right place whilst your head is in the clouds and your hand is in
someone else's pocket.

Paint both sides? Sounds like the stuff used was of the shrinking type often
based on cellulose, and this aspect is used in a aero modelling to tighten
up fabric or tissue covered surfaces.
Brian

--
From the Sofa of Brian Gaff Reply address is active
"Chris French" wrote in message
...
I have a couple of pieces of timberboard (the stuff made from strips glued
together) one 400mm wide one 300mm. To be used as a shelf along the top of
some boxing in a bedroom.

It's been sitting around in the house quite happily for a few months and
was still nice and flat. Today I stained it with a couple of coats of
Colron wood dye and now it has bowed (or cupped?) quite noticeably -
inwards on the stained side. doubly annoying as I was hoping to install it
and paint the walls this weekend

This doesn't seem to be something to be expected - but any comments before
I complain about it
--
Chris French

In article ,
says...

I have a couple of pieces of timberboard (the stuff made from strips
glued together) one 400mm wide one 300mm. To be used as a shelf along
the top of some boxing in a bedroom.

It's been sitting around in the house quite happily for a few months and
was still nice and flat. Today I stained it with a couple of coats of
Colron wood dye and now it has bowed (or cupped?) quite noticeably -
inwards on the stained side. doubly annoying as I was hoping to install
it and paint the walls this weekend

This doesn't seem to be something to be expected - but any comments
before I complain about it

Some years ago I built a cupboard with timberboard with a pair of hinged
doors that met in the middle. Assembled it and all OK. Stained both
sides of the doors and now there's a 1 cm gap between them!

--
TOJ.

On 11/07/2015 10:07, Brian-Gaff wrote:
Paint both sides? Sounds like the stuff used was of the shrinking type often
based on cellulose, and this aspect is used in a aero modelling to tighten
up fabric or tissue covered surfaces.
Brian


Dope.
No not Brian, the stuff is called dope.

On 11/07/15 13:12, dennis@home wrote:
On 11/07/2015 10:07, Brian-Gaff wrote:
Paint both sides? Sounds like the stuff used was of the shrinking type
often
based on cellulose, and this aspect is used in a aero modelling to
tighten
up fabric or tissue covered surfaces.
Brian


Dope.
No not Brian, the stuff is called dope.

Depends which way its bowed. Water based stiff will bow tangential grain
wood till it dries completely


--
New Socialism consists essentially in being seen to have your heart in
the right place whilst your head is in the clouds and your hand is in
someone else's pocket.

On 10/07/2015 21:16, Chris French wrote:
I have a couple of pieces of timberboard (the stuff made from strips
glued together) one 400mm wide one 300mm. To be used as a shelf along
the top of some boxing in a bedroom.

It's been sitting around in the house quite happily for a few months and
was still nice and flat. Today I stained it with a couple of coats of
Colron wood dye and now it has bowed (or cupped?) quite noticeably -
inwards on the stained side. doubly annoying as I was hoping to install
it and paint the walls this weekend

This doesn't seem to be something to be expected - but any comments
before I complain about it

That is always a risk when you finish just one side of a board. Try
staining the other side, and see if that helps pull it back.

--
Cheers,

John.

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| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/

On Friday, 10 July 2015 21:20:57 UTC+1, Chris French wrote:
I have a couple of pieces of timberboard (the stuff made from strips
glued together) one 400mm wide one 300mm. To be used as a shelf along
the top of some boxing in a bedroom.

It's been sitting around in the house quite happily for a few months and
was still nice and flat. Today I stained it with a couple of coats of
Colron wood dye and now it has bowed (or cupped?) quite noticeably -
inwards on the stained side. doubly annoying as I was hoping to install
it and paint the walls this weekend

This doesn't seem to be something to be expected - but any comments
before I complain about it
--
Chris French

You have to paint/stain/other treatment both sides to prevent this.
Bare timber is constsntly changing moisture content.
Painting stops this from happenng

In message , The Natural Philosopher
writes
On 11/07/15 13:12, dennis@home wrote:
On 11/07/2015 10:07, Brian-Gaff wrote:
Paint both sides? Sounds like the stuff used was of the shrinking type
often
based on cellulose, and this aspect is used in a aero modelling to
tighten
up fabric or tissue covered surfaces.
Brian


Dope.
No not Brian, the stuff is called dope.

Depends which way its bowed. Water based stiff will bow tangential
grain wood till it dries completely


It is a waterbased formulation I think (without going to find the tin).

Anyway, thanks folks, gave it a coat on the back and left it and it now
seems a lot flatter. Will try it in place tomorrow
--
Chris French