LRoom. Export Presets such as b&w?

[hangerhead]

I've edited all my RAW files in colour and exported them as jpegs to a folder.
I now want to re-export all images using a b&w filter I have set up but this doesn't seem to be available as a user-preset for export (i think THOSE presets are only the jpeg size/location/post-export treatments).

However, instead of simply changing all the RAW inmages in b&w using my preset (which means I would then ahve to UNDO all the changes to revert back to the preferred colour images), what can I do instead to use my b&w user-preset as an export command?

in other words, i don't want to apply my preset to all the RAAW images now and then export them, because this means that i would not have access to the colour versions again without re-processing them (i think).

is there a method even to do a twin export at the same time? do all colour first and then in a new B&W folder, export again applying the b&w filter, BUT without measning that the RAW files have the B&W filter applied to them?

 

[Jellycat]

You could create a virtual copy of your colour edited file in light room and convert that to b&w.

 

[hangerhead]

You could create a virtual copy of your colour edited file in light room and convert that to b&w.

I found basically, exactly that!

Or, select the images, hit the plus sign on the Collections header bar, choose 'Create Collection...', name it B/w, or Selenium, whatever, and choose both 'Include Selected Photos' and 'Make new virtual copies'. Select all in the collection, apply the preset, Ctrl-Shift-E to export. Done