Whittock, Nathaniel: The Art Of Drawing And Colouring From Nature, Flowers, Fruit, And Shells: To Which Is Added, Correct Directions For Preparing The Most Brilliant Colours For Painting On Velvet, With The Mode Of Using Them, Also The New Method Of Oriental Tinting ; With Plain And Coloured Drawings (London, 1829)

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of the common water-colour. If the colours are bought already pre-
pared from the shops, it will be necessary to have a little gum tragacanth
in a small cup, to mix with the tints when poured from the bottles into
the small saucers, as they are frequently prepared without any gum
to bind them ; but if the colours are mixed, according to the direc-
tions contained in this work, with gum dragon, they will not require
any other binder. The student who can produce flowers on paper,
has only to acquire the method of applying the colours to the vel-
vet, the principle being the same in both cases, with this excep-
tion, that the dark shades are always applied first when painting
on velvet.
If the green given for the leaves is too cold, it can be heightened by
mixing a little more yellow with it, and if it is required to be more
red, add a little of the standard brown. In shading leaves always
work from the division in the middle of them to the sides, put on all
the shades, and afterwards vein them with asphaltum or vandyke
brown.
The rose buds, in Lesson VII. will be beautisul subjects sor
velvet painting. The light part of the corolla must be a very light
tint of the pink saucer, and shaded with the burnt crimson. The calyx
must be a bright yellow green, and, when dry, mossed with crimson
and brown, worked one among the other, and brought over the edges
of the green.