Would anyone know why....

[bluebedouin]

....this stick has become discoloured?

Pic 1 is of a stick I brought inside to straighten,the whole length is this colour.

Pics 2,3 & 4 are of another one left outside.In 3 & 4 the discoloured parts are where clamps were.Could it be something to do with the dark or rain?

[bluebedouin]

Amazing! I posted this thread before I went out last night.I'm quite surprised that out of 198 views from professional arborists that no one has an answer.

Has nobody seen this phenomenon before?

[agg221]

Where did you keep the stick outside?

 

Alec

[peatff]

I'm not a professional, Birch shows different colours on new growth. I don't know what wood yours is but it could be it's affected by the UV where it was exposed.

[bluebedouin]

Where did you keep the stick outside?

 

Alec

Out on the decking,I had it clamped to it to straighten.

The piece I brought inside had various clamps attached to it on a piece of 4x4,also to straighten.(I'm experimenting with making walking sticks & canes.)

Edited July 10, 2016 by bluebedouin

[bluebedouin]

... I don't know what wood yours is ...

To be honest,I'm not sure myself.It was at the side of the canal.I stripped the bark & revealed the little nodules as seen in pic.

[Mick Dempsey]

Amazing! I posted this thread before I went out last night.I'm quite surprised that out of 198 views from professional arborists that no one has an answer.

Has nobody seen this phenomenon before?

Probably because,

It's an intriguing title, but then there's a picture of a stick.

[bluebedouin]

(I'm experimenting with making walking sticks & canes.)

This was my first attempt.Charred with a blowtorch then waxed.

[bluebedouin]

Probably because,

It's an intriguing title, but then there's a picture of a stick.

Ah yes but,not any old stick!

[agg221]

Out on the decking,I had it clamped to it to straighten.

The piece I brought inside had various clamps attached to it on a piece of 4x4,also to straighten.(I'm experimenting with making walking sticks & canes.)

 

In that case, it will be the same reason that any wood goes silvery grey eventually if left outside. The extractables (including colour) are not UV stable so they degrade to a soluble form and are then washed off by the rain. That's why it is still coloured where protected by the clamp.

 

Alec