[cs_content][cs_section parallax=”false” separator_top_type=”none” separator_top_height=”50px” separator_top_angle_point=”50″ separator_bottom_type=”none” separator_bottom_height=”50px” separator_bottom_angle_point=”50″ style=”margin: 0px;padding: 45px 0px;”][cs_row inner_container=”true” marginless_columns=”false” style=”margin: 0px auto;padding: 0px;”][cs_column fade=”false” fade_animation=”in” fade_animation_offset=”45px” fade_duration=”750″ type=”1/1″ style=”padding: 0px;”][cs_text]The Chemistry of Art > 1. Pigments in Painting > Colour Can Be Obtained >[/cs_text][cs_text style=”color: #800000;font-family: “Oxygen”,sans-serif;”]Colour can be obtained through pigments spread on a surface layer (e.g. paints) or mixed with the bulk of material (e.g. glass colours)[/cs_text][cs_text]
- Metal oxide pigments were used for painting were also used to colour glass
Method 1: Powdered Oxides
- Oxides are finely powdered and are added to glass mixture before melting
- Examples:
- Cobalt oxide = Blue
- Manganese oxide = Purple
- Iron oxide = Green or bright yellow
- Copper (II) oxide = Red
Method 2: Staining
- Glass is painted with silver nitrate then fired in oven
- Yellow tones, ranging from pale yellow to deep orange indicates the number of times stained and fired
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