Set up length-ways and look through your colours for either a strong red (such as cadmium red) or Ultramarine. Then put a small amount of pigment on your palete and work inwater or turps until you have a strong fluid mix of the colour. Load a medium wide brush and work from the top to the bottom of the sheet with increasingly dilute mixes of the colour until, at the bottom of the sheet you have a very pale wash, almost faded out to white.
It was eveming and I had neither a string red or so I tried mixing two blues together to start and the only paper I had was a thin 150 gsm watercolour paper. I learnt my lesson, the two acrylic blues werent mixing together as well as i thought they would and the dilute wash was very streaky and between that and the thin paper the results were horrifying.
I decided to start again the next day after I purchased some Ultramarine paint and some nice Canson 300 gsm watercolour paper as well as a good quality medium brush. With the new quality tools i started to produce quality washes.
i found it wasn’t as straight forward as working my way tk the bottom with increasingly dilute mixes, occasionally I had to load up the brusb with a thicker mix and work my way back up to get the graded wash.
intitally started out by bulldog clipping the sheets to the drawing board but as i got better at the tonally graded washes i let the bulldog clip alone.
As the brief instructed I practised this several times until I had a satisfactory progression from deep tones to the very palest tones. All the time controlling the load on the brush and the flow of paint on the paper to avoid the paint running, then I put the ones with the most steadily graded wash aside to dry to be used in the next exercise, overlaying washes. I then did more washes in a dilute mix of violet as it is close to the original colour on the spectrum (as instructed) and set those aside for the next exercise as well.
Then i worked wet-in-wet and painted a graded wash of the second colour (violet) on to one of the sheets with the second colour (ultramarine) and vice versa allowing the colours to merge in the centre, what i found was that the violet and ultramarine formed layers of purple as they blended into each other which reminded me of an horizon seen from over the wing of an aeroplane.
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