Pigmented porous material

The present invention relates to a colored, preferably natural porous material comprising in its pores an effectively coloring amount of an organic pigment which is obtained by fragmenting a meltable or solvent-soluble pigment precursor in the presence of a thermally activated acid precursor, and to...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: HANS-THOMAS SCHACHT, GILBERT MOEGLE
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:The present invention relates to a colored, preferably natural porous material comprising in its pores an effectively coloring amount of an organic pigment which is obtained by fragmenting a meltable or solvent-soluble pigment precursor in the presence of a thermally activated acid precursor, and to a low to medium temperature process for its preparation.