DOI Page / Citation link:
https://doi.org/10.11588/diglit.62783#0043
IN FRESCO PAINTING.
xxxiii
particles, equally coloured throughout, and when put into water,
diffuses itself equally, but afterwards settles at the bottom of the
vessel. It will be observed that the several kinds of Haematite are
found generally together ; on referring to the description of Albin
and Pabonazo, we shall find that both pigments are classed together
by Palomino as well as by Pacheco. CARNEGIE LIBRARY, AYR.
The purple tinge, observable in the colour of the Haematite, is to
be attributed to the presence of a small portion of manganese, which
is wanting in the ochres. The colour of the pigment, when washed
and ground, is scarcely to be distinguished from Indian red.
The soft red Haematite is the mineral from which the Matita
Rossa is prepared. This is proved by the following passage from
Baldinucci’s Life of Cennini, (Opere vol. 4, p. 485).—“ Among
other things that I observed cursorily, Cennini, mentioning that
stone with which we draw, and which we call * Matita,’ gives
it the name of Lapis Amatito, agreeably to its true origin Lapis
Hcematitos, meaning stone of a blood colour.” The red chalk crayons,
as they are called, now in use in England, are prepared by grinding
Haematite to an impalpable powder in a porphyry mortar, and
making the powder into pastiles with gum or isinglass (Mag. Science,
vol. i. p. 349).
The Tierra Roxa of Palomino must have been different from the
Pabonazo, since that author says its tint is deepened by time (en
fortalecerse), whereas the Pabonazo did not change, (Pabonazo y
Albin no hacen mudanza). It has been observed by many writers
on colours, that ochres, whether raw or burnt, have a tendency to
darken in time.
The red ore of iron, commonly called red chalk, or ruddle, is of a
brick red, or brownish red colour, massive, and with an earthy
fracture, is dull, soft, meagre to the touch, stains the fingers, writes
easily, and adheres to the tongue. It is found in clay slate, in sand-
stone and in lime-stone. Phill. Min. Tit. Red Iron Ore,—Sub Tit.
Red Chalk.
Sinopia is often confounded with Armenian Bole; so it is trans-
lated by Dr. Holland the translator of Pliny. Geo. Agricola, who
appears to have studied mineralogy so deeply, remarks that the
colour of his Armenian Bole is “ pallido,” whereas he says that of
xxxiii
particles, equally coloured throughout, and when put into water,
diffuses itself equally, but afterwards settles at the bottom of the
vessel. It will be observed that the several kinds of Haematite are
found generally together ; on referring to the description of Albin
and Pabonazo, we shall find that both pigments are classed together
by Palomino as well as by Pacheco. CARNEGIE LIBRARY, AYR.
The purple tinge, observable in the colour of the Haematite, is to
be attributed to the presence of a small portion of manganese, which
is wanting in the ochres. The colour of the pigment, when washed
and ground, is scarcely to be distinguished from Indian red.
The soft red Haematite is the mineral from which the Matita
Rossa is prepared. This is proved by the following passage from
Baldinucci’s Life of Cennini, (Opere vol. 4, p. 485).—“ Among
other things that I observed cursorily, Cennini, mentioning that
stone with which we draw, and which we call * Matita,’ gives
it the name of Lapis Amatito, agreeably to its true origin Lapis
Hcematitos, meaning stone of a blood colour.” The red chalk crayons,
as they are called, now in use in England, are prepared by grinding
Haematite to an impalpable powder in a porphyry mortar, and
making the powder into pastiles with gum or isinglass (Mag. Science,
vol. i. p. 349).
The Tierra Roxa of Palomino must have been different from the
Pabonazo, since that author says its tint is deepened by time (en
fortalecerse), whereas the Pabonazo did not change, (Pabonazo y
Albin no hacen mudanza). It has been observed by many writers
on colours, that ochres, whether raw or burnt, have a tendency to
darken in time.
The red ore of iron, commonly called red chalk, or ruddle, is of a
brick red, or brownish red colour, massive, and with an earthy
fracture, is dull, soft, meagre to the touch, stains the fingers, writes
easily, and adheres to the tongue. It is found in clay slate, in sand-
stone and in lime-stone. Phill. Min. Tit. Red Iron Ore,—Sub Tit.
Red Chalk.
Sinopia is often confounded with Armenian Bole; so it is trans-
lated by Dr. Holland the translator of Pliny. Geo. Agricola, who
appears to have studied mineralogy so deeply, remarks that the
colour of his Armenian Bole is “ pallido,” whereas he says that of