Red Iron Oxide in Ceramic Craft: Uses, Applications, and Combinations

Red iron oxide is one of the most versatile materials in ceramic craftsmanship. Its use dates back centuries, providing warm and deep colors ranging from terracotta tones to intense reds. In this article, we will explore its applications, how to combine it with other raw materials, and the effects you can achieve in your ceramic pieces.

What is Red Iron Oxide?

Red iron oxide (Fe₂O₃) is a natural pigment used in ceramics to provide color and texture to glazes and slips. Depending on the firing temperature and atmosphere, it can produce a wide variety of shades, from soft oranges to deep browns.

Uses of Red Iron Oxide in Ceramics

1. Coloration of Ceramic Pastes

It is used to dye the clay before firing, resulting in pieces with reddish and earthy tones, highly valued in traditional and rustic ceramics.

2. Slips and Surface Decoration

Applied in the form of slip on raw pieces, it provides a vibrant color that can be modified with glazes or by leaving areas exposed for natural effects.

3. Ceramic Glazes

It is a key component in the formulation of glazes. In an oxidizing firing, it usually produces red or brown colors, while in a reducing atmosphere it can yield bluish or black shades.

Combinations with Other Raw Materials

Red iron oxide can be mixed with different materials to modify its appearance and effects in ceramics:

With chromium oxide: It generates dark green and brown tones.

With cobalt oxide: It can produce metallic effects and intense black tones.

With tin oxide: It softens the intensity of red and creates pink tones.

With zirconium silicate: It is used to stabilize colors and prevent unexpected reactions.

Tips for Its Use

Control the firing temperature: At low temperatures, reddish tones prevail; at higher temperatures, it can darken or turn brown.

Experiment with different atmospheres: In reduction, iron oxide can surprise with unexpected effects.

Test on small samples: Before applying it to a final piece, do tests to see how it reacts in your kiln and with your glaze.

Red iron oxide is an essential material in handmade ceramics. Its versatility allows for the creation of unique pieces with warm, earthy finishes, and its ability to combine with other raw materials makes it your perfect ally to experiment and develop your creativity. Dare to try it in your next creations and discover all it can bring to your ceramics!