Improve your colours with Surface Treated Pigments
Be it red, green, blue or yellow, colours make a difference to our world. Every industry that wishes to attract consumers uses a variety of colours to make the product attractive. But colour also serves as a strong component in protection, identification and safety of the product and its unique features. Colours as we know it are available in two types, pigments and dyes. A variety of pigments are available to make desired colours. But to get the desired properties surface treatment of pigments are needed.
Usually, pigments have a hydrophilic surface that leads to a set of problems. These problems include poor wettability and dispersibility, poor skin feel, poor chemical stability and other issues. Through the surface treatments, the chemical and physical properties of the pigments are altered to achieve the desired functional and aesthetic appeal.
Surface Treatments are effective depending on the properties of the surface that may be suitable or unsuitable for the treatment. The treatment can make the surface hydrophobic, hydrophilic or lipophilic.
Benefits of Surface Treated pigments
• Reduced agglomeration or hard cake formation
• Lower oil absorption
• Reduced absorption of dispersant
• Powder pressing becomes more easy in cosmetic manufacturing
• Require lower binder content improving the skin feel for cosmetics
• New and improved products
Surface treated pigments in India are available only with reputed manufacturers who have the capabilities, infrastructure and the expertise to customize the colours and treat them as per client requirements.
Pigment surface can be treated to alter the shape and size of the particles, for fastness, to achieve better chemical constitution, absorption and dispersibility characteristics. Several methods of surface treatments are available which make it easier for surface treated colour companies to modify the surface as needed. Monomolecular layer or multi-molecular layers can be used to cover the surface as per requirements. Also, a particle coating or complete coating can be done. The amount of coating used depends on the type of pigment and the application desired.
Alumina and silica are used as agents in surface treatments. In the surface treatment process, the substrate is precipitated on the pigment and multiple layers are used depending on the characteristics to be achieved after the coating process.
Inorganic pigments for cosmetics like Titanium Dioxide, Mica, Zinc etc. are surface treated for adding characteristics like skin safety, moisture retention, softer touch, enhanced optical characteristics and more. Materials such as amino acids, metallic salts, silicon, oily ester and more are used for surface treatment of cosmetic pigments utilizing various techniques.
Surface treated pigments in India are manufactured after the necessary Research and Development processes to ensure high-quality of the pigments. These surface treated pigments are used in cosmetic colours, pharmaceutical colours, food colours and more. The surface treatment varies as per the grade required.
Each coating agent or coating substrate has its unique advantages and is ideal for certain products. For example, Dimethiconol Stearate as a coating agent can give an excellent skin feeling while aluminium stearate delivers an anti-caking effect. Similarly, there are coating agents for matt skin feel, better adhesion, creamy feel, compressibility and other properties.
The bottom line is surface treatments are essential to create better products with improved colours. So, which colours and pigment properties are you interested in?