Faber Castell 9000 series are high grade break-resistant pencils whose range allows both fine, precise drawing and dark, strong depth.
Winsor and Newton Series 7 Miniature are perfect for botanical painting, the broad belly holding a good amount of paint, but the fine tip giving control. Sizes 1 and 4 will do most jobs. Heidi uses a flat size 0 or 00 brush for lifting colour.
Heidi's palette includes paints from Winsor and Newton, Daniel Smith, Daler Rowney and others. A few favourites are W&N Perylene Violet, for deep red-brown hues and Daniel Smith Quinacridone Coral, Pyrrol Red and Phthalao Blue Red She, a non-granulating alternative to French Ultramarine.
Heidi is using old stocks of Fabriano Extra White Hot Pressed paper 300gsm or 600gsm, which provides a heavy, white smooth base.
Tracedown paper (graphite shade) allows transferring of sketches to watercolour paper, using putty rubber to cleanly remove excess. Heidi also uses a thin Huion A3 light box, when not stretching the paper.
Stilman and Bird produce excellent, heavy sketchbooks. The Epsilon series has thick white pages, great for watercolour. A4 is a good size, which allows A3 sized work across a fold.
MDF board, cut to size, and preferably sealed, is an ideal stretching base. The larger the piece, the thicker the board required.
Protection of paper while working
Artcel triacetate film, or any stiff transparent acetate, allows perspective over the whole piece while working.
A Winsor and Newton Eden upright desk easel helps avoid neck strain and assists perspective.