Microcapsules having improved printing and efficiency

Abstract From the Canadian patent

Dual shell microcapsule aggregate particles and copy materials coated therewith, such aggregate particles having inner shells surrounding chromogenic nucleus material, and outer shells encompassing multiple such inner shells to form aggregate particles thereof. The inner shells are derived from polar pre-polymer compositions. The outer shells are derived from complex colloids such as gelatin and gelatin derivatives. The outer shell material causes agglomeration of the inner shells into aggregate particles thus , increasing the sizes of the particles without increasing the sizes of the respective inner-shell microcapsules which contain the chromogenic material.