Rockwood 8-K Regulation FD Disclosure

Exhibit 99.1

Q4 Sales Growth: Pro-forma

($ M)	Net Sales		% Change
Q4 2005	$	762.4
Q4 2004 (a)	755.1
Change	$	7.3	1.0	%
Due to (Approx.):
Pricing			2.3	%
Currency			-5.5	%
Volume/Mix			4.2	%

(a)Pro-forma as if the Groupe Novasep acquisition had been completed at the beginning of Yr 2004.

1