I just thought it might be interesting to post a couple of versions of a colour digital image, converted to B&W and then choosing from the "filters" that DxO FilmPack provides.
First the colour original after basic processing:

Now just converted to Fuji Acros 100:

Now with a blue filter:

And finally with a red filter:

Of course, you could always use the channel mixer but I just wanted to show a basic, simple to achieve, example of what colour filters can do to B&W images.
First the colour original after basic processing:

Now just converted to Fuji Acros 100:

Now with a blue filter:

And finally with a red filter:

Of course, you could always use the channel mixer but I just wanted to show a basic, simple to achieve, example of what colour filters can do to B&W images.