Brassia What are these marks on my leaf

[datperson12345]

I've been leaving this orchid outside in the shade,
and when I was bringing it in i noticed I had some odd markings on the leaf whilst it was outside it didn't rain it was just sunny.

[silken]

It looks like a touch of sunburn to me.

[datperson12345]

what about the white marks under the leaf

[WhiteRabbit]

good luck!

[lepetitmartien]

First pic = sunburn I think

Second pic = Not all part of leaves react the same way in photosynthesis, if the light elvel is ok, it'll disappear. It's just zones reacting differently to higher light levels.

Now if there's too much light (and heat/dry air) sunburn occurs.

[Orchidsoutdoors]

Ditto on sunburn, it often looks like a spot on the leaf that's faded or bleached.

[euplusia]

Nice, you've had the sun shining in England.

[datperson12345]

Updates on it, the brown marks have spread throughout the leaf, also my paphiopedilum has these yellow/brown/black marks.

[euplusia]

As for the Brassia: I would take a razor blade now and cut away the discolored area 1-2 cm away from the border in heathy tissue.