Prior art processes for producing protein-based capsules (for example, capsules for use in electrophoretic media) tend to be wasteful because they produce many capsules outside the desired size range, which is typically about 20 to 50 μm. Capsule size distribution and yields can be improved by either...http://www.google.de/patents/US20050156340?utm_source=gb-gplus-sharePatent US20050156340 - PREPARATION OF CAPSULES
