| Titre : |
Effect pigments - pearlescent pigments (Part 1) |
| Type de document : |
texte imprimé |
| Auteurs : |
Yash Melkeri, Auteur ; Tipanna Melkeri, Auteur |
| Année de publication : |
2017 |
| Article en page(s) : |
p. 70-76 |
| Langues : |
Anglais (eng) |
| Catégories : |
Matières plastiques -- Coloration
Mica
Oxydes métalliques
Pigments à effets spéciaux
Pigments inorganiques
Pigments nacrés
|
| Index. décimale : |
667.2 Colorants et pigments |
| Résumé : |
Pearlescent pigment is a type of effect pigment. It is obtained by coating metal oxide on laminar flat surfaces such as natural mica. Different metal oxides are used to prepare pearlescent pigments, such as titanium dioxide, iron oxide, zirconium oxide, chromium oxide etc. Substrate selected can be either natural or synthetic. Between the two, natural mica is widely used substrate to prepare pearlescent pigments. But nowadays synthetic mica and borosilicateglass are also used to prepare pearlescent which provide brilliant sparkling effect. Pearlescent effect is observed as the result of multiple reflection, refraction and diffraction phenomenon. When mica is coated with titanium dioxide, a silver colour pearlescent pigment is obtained. As the thickness of TiO2 coating increases, because of the interference effect the colour changes from silver to yellow to pink to blue to green. The coating of iron oxide on mica results into bronze, copper and wine red colours as the thickness of the coating increases. When mica is coated with titanium dioxide and iron oxide together, a gold colour pearl pigment is obtained. Pearl pigments are available in the various grades depending upon the particle size. Pearlescent pigments are used in paints, plastics, papers, and automotive industry. One must follow some basic guidelines to use pearl pigment in plastics. In contrast to absorption colours, there is a trick in mixing colours to get desired colour in pearl pigment. |
| Note de contenu : |
- NATURAL MICA : Calcium-aluminum borosilicate - Fluorophlogophite - Aluminum oxide (alumina)
- METAL OXIDE
- PEARLESCENT EFFECT
- INTERFERENCE EFFECT
- PEARLESCENT PIGMENTS IN PLASTICS
- GUIDELINES FORF USE OF PEARLESCENT PIGMENTS IN PLASTICS
- IMPORTANT TIPS FOR MOLDING AND EXTRUSION
- TRICKS OF MIXING COLOURS WITH PEARLESCENT PIGMENTS |
| En ligne : |
https://drive.google.com/file/d/1Uc7WWN3ZE0Mhp26i4Kgy1lpxDn0rFSOO/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28460 |
in PAINTINDIA > Vol. LXVII, N° 4 (04/2017) . - p. 70-76
Aller sur edunet
Accueil
Effect pigments - pearlescent pigments (Part 1) in PAINTINDIA, Vol. LXVII, N° 4 (04/2017)
