Patent ID: 7413773
Filing Date: 2008-08-19
Classification: E04B,E04C

Abstract:
1. A method for internally coloring a hollow glass-like block having an interior cavity comprising the steps of: drilling at least one hole in at least one corner side wall of said block; removing any residue caused by said drilling from said interior cavity of said block; introducing a coloring agent material into said interior cavity of said block through said at least one hole; temporarily sealing said at least one hole so as to retain said coloring agent material within said interior cavity; rotating said block in such manner as to coat its entire interior cavity with said coloring agent material; removing said temporary sealing so as to expel any excess coloring agent material from said interior cavity; expelling said excess coloring agent material from said cavity so as to leave a permanent interior coating therein; allowing said coating material to dry; permanently sealing said at least one hole.