No matter what your technique,there are certain attributes that you can expect from good-quality coloured pencils. They should:
release their colour evenly and smoothly,regardless of the pressure used blend easily with each other and with other brands have uniformity of texture throughout –few bits of grit or other such impurities have a high degree of colourfastness have rich,strong colour sharpen evenly –this requires a centred lead,similarity of sides in the wood casing,and no warping hold a point –some snap or crumble as soon as they touch the paper
Other attributes that have nothing whatsoever to do with the performance of the pencils themselves but are desirable nonetheless are:
the lightfastness rating marked,easily legible,on each pencil have colour names that identify the pigments used or at least give a clear idea of the actual colour (a fanciful name such as “party-hat pink” tells us nothing at all about that pink)
I own several brands of pencils,but Faber Castell Polychromos,Derwent Coloursoft,and Caran d’Ache Luminance (a recent acquisition) are my favourites.