Colour into tones in black and white

My second completed exercise (which is not necessarily in the same order as the unit but this is because of time available and the work I had done so far on this section) was to demonstrate how coloured filters will allow certain colours to pass through but block others - in this case, using a photograph that features strong elements of the colours blue, red, green and yellow.

I took a still life picture of a green Christmas table decortaion with added red baubles on a blue surface and against a yellow background. The image was then converted into a black and white photograph before each of the digital colour filters in Photoshop Elements were applied.

Initially, I used a colour filter density of 25% but found these to be too subtle and so re-applied the filters but this time at double the 'strength' at 50% for which I got a much better result but was still not satified. The images here are at a very strong level (75%) which does work better albeit a bit over powering. However, in each case (and referring back to the original colour photograph), you can see the contrast of the filter with its respective tone in the black and white picture.

Mark