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  1. If this is your first visit to Natural Pigments, be sure to check out the FAQ. You must register before you can post in the forum; click the register link to proceed. If you are a member of the previous Natural Pigments forum, use your display name and password to log into the new forum.
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    Hues or Mixed Colors of Historical Origin 

    by
    George O'Hanlon
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    Published on February 5, 2013 01:00 PM  Number of Views: 3428 
    1. Categories:
    2. Oil,
    3. Watercolor,
    4. Formulas,
    5. Historical Pigments

    During the Middle Ages and the Renaissance, the paint used by artists was prepared in the studio. The painter purchased pigment from apothecary shops and apprentices, who also prepared panels and grounds for the master painter, then prepared it for use as paint.

    The oil paint used by artists from the 15th to 19th centuries consisted primarily of a single pigment and vegetable drying oil, although gums, proteins and resins were sometimes added for particular passages in ...
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    Colors from the Earth: Violet Hematite 

    by
    George O'Hanlon
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    Published on April 25, 2012 12:00 PM
    1. Categories:
    2. Oil,
    3. Historical Pigments
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    Rublev Colours Violet Hematite is a deep reddish purple hue that tints toward subtle violets when mixed with white. It is useful in flesh tints, shadows and its purple bias makes good grays. Rublev Colours Violet Hematite is formulated using pure natural ground hematite (Colour Index Name Pigment Red 102 or PR 102) that is absolutely permanent and very opaque. This beautiful earthy red violet is cooler than other red iron oxide earths, such as Venetian red or Sartorius red.


    [FONT=tahoma]Color swatch of Rublev Colours Violet Hematite ...
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    Reactive and Non-Reactive Pigments 

    by
    George O'Hanlon
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    Published on April 24, 2012 12:02 PM
    1. Categories:
    2. Oil

    The reaction of natural and synthetic mineral pigments with binders containing lipids, such as egg yolk, drying oils, etc., has been reported by various authors.

    Generally, the formation of metallic soaps with the free fatty acids in the binders is assumed to be the reaction. These metallic soaps may act as driers, accelerating the oxidation and polymerization ...
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    Aqueous Pigment Dispersions 

    1. Categories:
    2. Acrylic,
    3. Casein,
    4. Fresco,
    5. Tempera,
    6. Watercolor,
    7. Pigment Dispersions
    Article Preview


    Natural Pigments introduces a new way of making traditional waterborne paint: Rublev Colours Aqueous Dispersions. ...
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    Colors from Du Fresnoy's De Arte Graphica 

    by
    George O'Hanlon
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    Published on April 24, 2012 12:02 PM
    1. Categories:
    2. Oil,
    3. Color Palettes

    Du Fresnoy wrote about colors that appear on the palette of 17th century artists, such as Rembrandt and Rubens, and that appear in Roger de Piles’ translation of De Arte Graphica:

    Red Oker
    is one of the most heavy Colours.

    Yellow Oker is not so heavy, because 'tis clearer.

    And the Masticot is very light, because it is a very clear yellow, and
    ...
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    Why Some Paints are Transparent and Others Opaque 

    by
    George O'Hanlon
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    Published on April 24, 2012 12:01 PM
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    Artists are sometimes surprised to see one application of paint barely hide the drawing or underpainting below, and another color completely mask all that was underneath. Some wonder why a few months after they completed a painting, they begin to see pencil lines of the sketch that before were completely unnoticed. (This effect is called pentimento.) Other artists wishing to apply a beautiful glaze are frustrated when the glaze kills the color below. These are common problems experienced by all painters at one time or another, but the reasons are little understood.

    Given the same thickness of applied paint film, not ...
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    Ancient Pigments and their Identification in Works of Art 

    by
    George O'Hanlon
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    Published on April 24, 2012 12:01 PM
    1. Categories:
    2. Tempera,
    3. Historical Pigments

    DURING the history of Art, from the earliest times to the present day, certain pigments have remained common to the artists palette, and while some have dropped out of use, others have been added. Although a great deal of information on the subject has been collected from the examination of old records, and, in addition, by the occasional analysis of the actual pigments used, the whole subject seems to me to be deserving of a more exact inquiry than it has as yet received.

    It is, in the first place, a matter of considerable interest to know what pigments were in actual use at various periods in the history of Art, and how far in practice the old receipts represented the artists palette. Such information, if sufficiently complete, would be of great assistance in dating unquestionably many objects of art, and would in many cases be invaluable in detecting forgeries. Moreover, such an inquiry might result in the associating of certain pigments with certain places and schools of painting, and even with individual painters.

    The inquiry, however, presents certain obvious difficulties, as it is seldom that the chemist is allowed sufficient freedom with an ancient picture or ...
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    Stack Process Lead White 

    by
    George O'Hanlon
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    Published on October 13, 2011 12:00 PM  Number of Views: 2254 
    1. Categories:
    2. Oil,
    3. Casein,
    4. Tempera,
    5. Tips and Hints,
    6. Historical Pigments
    Article Preview

    Rublev Colours Stack Process White Lead is made in small amounts according to 16th century Dutch method, differing little to the historical “stack process.” It is basic ...
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    Vermilion and Cinnabar Toxicology Test Results 

    by
    George O'Hanlon
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    Published on October 1, 2011 12:02 PM
    1. Categories:
    2. Oil

    Vermilion and cinnabar are historical pigments that are compounds of red mercuric sulfide (HgS). The former is the artificial mineral pigment, whereas the latter, cinnabar, is the mineral found in nature. ...
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    Purifying Natural Ultramarine (Lazurite) 

    by
    George O'Hanlon
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    Published on September 26, 2011 03:53 PM  Number of Views: 645 
    1. Categories:
    2. Tutorials,
    3. Formulas,
    4. Historical Pigments

    This pigment is ground, washed and sieved but has not been otherwise processed in any other way.

    You can also find most other ingredients that you may need to replicate Cennini’s ...
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    Color in Old Russian Painting 

    by
    George O'Hanlon
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    Published on September 21, 2011 10:56 AM
    1. Categories:
    2. Tempera,
    3. Color Palettes,
    4. Historical Pigments
    Article Preview

    An ancient artist working at his painting perceived himself as a creator. In his search for original ways of self-expression, he experimented with different materials and techniques as part of that expression. However, the ancient icon painter sees himself as part of creation — the visible universe created by God. The icon painter submits his will to the Creator of all things. Therefore, in his works he uses the materials God made through the creation of the world. Medieval icon painters made abundant use of natural pigments — both mineral ...
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    Pigments from the Earth: Part 1 

    Published on September 21, 2011 09:57 AM
    1. Categories:
    2. Oil,
    3. Casein,
    4. Fresco,
    5. Tempera,
    6. Watercolor,
    7. Tutorials,
    8. Tips and Hints
    Article Preview

    Finding and collecting earth pigments can be both exciting and rewarding endeavor. Collecting pigments from the earth is something that can be done causally as you drive through the country, or with much planning and preparation to identify and collect specific mineral pigment types. This is the first article in a series on finding, collecting and preparing your own earth pigments.

    A few years ago, I stopped along Highway 80 in ...
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    Page 1 of 2 12 Next LastLast
  • Articles in this Section

    Color Perception (2)
    Historical Pigments (30)
    Pigment Dispersions (1)
  • Forum Posts About Pigments

    James Postill

    Re: fresco question: mix & match lime qualities?

    The most recent result I got from a fresco done with my lime putty mixed with marble dust, was a series of cracks which fragmented the whole image on the tile (some of the pieces had delaminated). ...

    James Postill Yesterday, 07:41 PM Go to last post
    George O'Hanlon

    Re: Toxicity in Pigments

    The problem that you have noted regarding the differences in safety information is quite common. There are some 40,000 chemicals in commerce, most of which have not been tested for chronic toxicity....

    George O'Hanlon May 14, 2013, 05:29 PM Go to last post
    Donald Jusko

    Rublev Orange Ocher

    "Rublev Colours Orange Ocher is an opaque orange yellow with good tinting strength, fine grained and brushes “long” in the direction of the brush stroke. Our orange ocher is a single pigment color...

    Donald Jusko May 12, 2013, 03:42 AM Go to last post
    Koo Schadler

    Toxicity in Pigments

    I'm trying to understand potential pigment toxicity in greater depth. Its a complicated subject in that there are different ways a pigment can enter a body (absorption, inhalation, ingestion);...

    Koo Schadler May 8, 2013, 04:13 PM Go to last post
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    Theodor Adorno

    Georgia O'Keeffe

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