Layering a complementary colour tonal drawing in coloured pencil

Using subtle turquoise colours I draw a tonal underpainting that transforms normal reds into deep reds perfect for drawing cherries.
Please leave a message in the comments if you like this technique!!
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I used the following material to create the drawing:
Faber-Castell Polychromos
107, 121, 124, 142, 153, 154, 155, 156, 167, 226, 278
Holbein 011 Cherry Blossom
Luminance 001 White
Paper: Strathmore Bristol Smooth 400 series
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