Features of Cadmium Red Pigment from Nolifrit

Cadmium red pigment is the compound of Cadmium Sulfide and Cadmium Selenide(3CdS•2CdSe). Usually, The ratio of Cadmium Sulfide is 55%, Cadmium Selenide 45%.

Chemical Name Cadmium red pigment
Chemical Compositions Cadmium Sulfide, Cadmium Selenide
Pigment Index No. Pigment red 108
CAS No. 12214-12-9
Shape Red powder
Crystal form Hexagonal crystalline, Cubic crystalline.
Temperature resistance(max) 900℃

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Cadmium red pigment has very bright color. It’s of high temperature resistance, alkali resistance, light resistance, and atmospheric resistance. With strong coloring power and covering power, the color pattern of Cadmium red pigment can range from yellow, red to purple. The more Cadmium Sulfide(CdSe) contained in Cadmium red pigment, the darker its red color will be.

Cadmium red pigment can be applied in high temperature resistant paint. It also can be used in enamel, ceramic, glass, plastic, art pigment, print ink, paper, leather, colored sand architecture material and electric material, etc…

(Steel enamel cookware in Cadmium red color:)

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(Le Creuset Cast iron enamel cookware in Cadmium red color:)

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Hunan Noli Enamel Co., Ltd is the leader manufacturer of Cadmium red pigment in China, Focusing on the production of enamel pigments over 30 years.

As the sense of environmental protection enhanced in recent years, more and more small manufacturers of Cadmium red pigment have to stop their production, which makes Nolifrit the only and best choice for Cadmium red pigment. As our production is based on factories on west border areas in China, so there’s no worries for environmental pollution.

Cadmium red pigment produced in Nolifrit is very cost-effective, the price is half of the current international brand. Much cheaper than Ferro and Pemco(Prince).

Nolifrit once had a meet with the world’s top one brand of colored cast iron enamel cookware Le Creuset in the 24th International Enamellers Congress in Chicago. Le Creuset showed the strong interests in our Cadmium red pigment series. They are quite willing to build up the long term cooperation with us. If you are also one of the enamel cookware manufacturer like them, you can contact with us, we will send you our best offer for our enamel pigments.

 

Spotlight on cadmium red

Think of the colour red and most likely you will find yourself thinking of the big emotions and that is why artists like it so much. Red is an extremely dominant colour and even a small piece in a painting will catch your attention. It is the colour most often associated with powerful feelings such as love, passion and anger as well as heat, fire and blood. Cadmium red is a very strong, warm and opaque red and in the early part of the 20th century became a natural replacement for the distinctive but toxic vermilion.

Cadmiums have the broadest range of hues derived from any of the inorganic pigment groups. These hues range from pale to golden deep yellows, light fiery to deep oranges through to light bright scarlets to deep reds and maroons.

Moving Into The Red

It was some time after the introduction of cadmium yellow that cadmium red began to appear. The early reds were made by heating the cadmium yellow together with selenium. In 1919 a patent was registered for the production of cadmium orange and cadmium red. The method for this production was to mix cadmium salt solutions with alkali and alkaline earth sulphides and, in turn, to heat the resultant precipitate. For those of us who might not have been paying attention in our chemistry lessons: a precipitate is the solid material or collection of particles that is left in a solution after a chemical reaction and, not surprisingly, the process itself is called precipitation.

Advanced Production Techniques

The production of modern, high performance cadmium red is an expensive and lengthy process requiring only the purest raw materials to produce the best possible colour.

Transforming the cadmium metal into a usable pigment means it undergoes several carefully controlled chemical reactions and procedures using various ingredients including mineral acids, sodium sulphide flakes, water, and selenium. Towards the end of the process heating takes place to create the pigment and it is in this heating process that the quality and hue of the final pigment begins to form. The emerging pigment is then ground down into tiny particles – these grinding processes affect the way the pigment interacts with light. Fine particles have a good diffused reflection and produce a colour that is very strong and vibrant.

Safety

Cadmium itself is a heavy metal and is toxic but cadmium pigments are not classified as dangerous for use in line with EC classification. The level of soluble cadmium in the pigments is so low that no hazard warnings are needed and they pose no greater risk after swallowing or breathing in than other pigment types. Cadmium pigments are restricted for certain applications but this restriction does not apply to artists’ colours.

Go Red

Cadmium red will add brightness, strength, opacity and maybe a touch of passion to any artist’s work and is now widely regarded as a viable alternative to the erratic and toxic vermilion either natural or synthesised. Available from Winsor & Newton Artists’ Oil Colour: Cadmium Red and Cadmium Red Deep.

This article comes from winsornewton edit released

Cadmium Red Deep Pigment

Cadmium red deep pigment (PR108). Synthetic Inorganic pigment (Cadmium Sulphoselenide). Opaque. Good tinting strength. Excellent Lightfastness. Low oil absorption with slow drying rate. Suitable for all media except exterior. Used since early 20th Century.

Cadmium red deep pigment is cadmium zinc sulfoselenide (CdS, CdSe) produced by co-precipitating and calcining, at high temperature, a mixture of cadmium sulfide and selenide sulfide in varied ratios forming a partially crystalline structure with sometimes hexagonal or cubic forms. Cadmium pigments are the most durable yellow, orange and red inorganic pigments commercially available. They have excellent chemical and heat stability, and can be used in chemically aggressive environments and durable applications without color fade.

Cadmium sulfoselenide pigments were developed in response to the need for stable shades of cadmium orange to red colors. Cadmium and selenide salts are co-precipitated and then heated to 300 °C.

This article comes from naturalpigments edit released