DOI Seite / Zitierlink:
https://doi.org/10.11588/diglit.20658#0316
COLOURING SUBSTANCES,
due appearance. Other colours called the middle tints are combined of two or more which
moderate the tone of the principal one.
As colours acquire their proper brilliancy in proportion as they are deprived of all hetero-
geneous substances, nothing can be mixed with them without injuring or diminishing their effects:
hence the necessity of using in painting only the purest oils and the best distilled water.
In all sorts of painting with water it is requisite to use a mixture in the preparation of the
colours, to fix them the better on the substance on which we are to paint. This mixture ought
to be formed according to the qualities of the various colours; which are nevertheless injured
in some degree by the addition of heterogeneous particles, changing the texture of the com-
pound, and occasioning the rays of light to be reflected in a different manner from that produced
by the original colours. Hence it happens that all colours which have been mixed with too
much of these additional substances will take a different tone, and in course of time become
deeper and deeper, since all incorporating bodies absorb those rays they before reflected. It is
therefore very important for the preservation of drawings in water colours, to mix with the
original colours only that proportion of preparative substances which is indispensably necessary.
The following is the arrangement of the several colours, according to the different natural
kingdoms from which they are drawn :—
FEOM THE ANIMAL KINGDOM.
Cochineal
Carmine
Purple
Gall-stone
Lake
Indian ink
Pearl white
White of egg-shells
Ivory black
Bone black
Hartshorn black
FROM THE VEGETABLE KINGDOM.
f Copal f Iris green
r> . ] Sandarac Sun-flower blue
i Dragon's blood Dutch pink
LGamboge Artificial brown pink
f Arabic Lees ] Charcoal black
Gums ^ Senegal Lamp black
l_Tragacanth Bistre
j^gg l Indigo Blue black
(Sap green | 1 Peach black
FROM
due appearance. Other colours called the middle tints are combined of two or more which
moderate the tone of the principal one.
As colours acquire their proper brilliancy in proportion as they are deprived of all hetero-
geneous substances, nothing can be mixed with them without injuring or diminishing their effects:
hence the necessity of using in painting only the purest oils and the best distilled water.
In all sorts of painting with water it is requisite to use a mixture in the preparation of the
colours, to fix them the better on the substance on which we are to paint. This mixture ought
to be formed according to the qualities of the various colours; which are nevertheless injured
in some degree by the addition of heterogeneous particles, changing the texture of the com-
pound, and occasioning the rays of light to be reflected in a different manner from that produced
by the original colours. Hence it happens that all colours which have been mixed with too
much of these additional substances will take a different tone, and in course of time become
deeper and deeper, since all incorporating bodies absorb those rays they before reflected. It is
therefore very important for the preservation of drawings in water colours, to mix with the
original colours only that proportion of preparative substances which is indispensably necessary.
The following is the arrangement of the several colours, according to the different natural
kingdoms from which they are drawn :—
FEOM THE ANIMAL KINGDOM.
Cochineal
Carmine
Purple
Gall-stone
Lake
Indian ink
Pearl white
White of egg-shells
Ivory black
Bone black
Hartshorn black
FROM THE VEGETABLE KINGDOM.
f Copal f Iris green
r> . ] Sandarac Sun-flower blue
i Dragon's blood Dutch pink
LGamboge Artificial brown pink
f Arabic Lees ] Charcoal black
Gums ^ Senegal Lamp black
l_Tragacanth Bistre
j^gg l Indigo Blue black
(Sap green | 1 Peach black
FROM