What is the Coloreel ITCU? January 30, 2023 09:13 Updated Product Description The Coloreel ITCU unit is a stand-alone unit that dyes and processes white, previously unprocessedthread to the color of your choice. The Coloreel ITCU can be used with many existing embroidery machine brands. ITCU is the abbreviation for Instant Thread Coloring Unit. Also referred to as the Coloreel unit. Comments 0 comments Please sign in to leave a comment.