Exhibit 12

ROCKWOOD SPECIALTIES GROUP, INC.

COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES

	Year Ended December 31,
($ in millions, except ratios)	2010		2009		2008			2007		2006
Determination of earnings (losses):
Income (loss) from continuing operations before taxes	$	204.5	$	10.2	$	(670.0	)	$	131.6	$	101.2
Add:
Interest expense (a)	151.8		180.2		231.1			219.3		199.9
Rent expense (b)	9.5		9.3		9.4			8.1		8.3
Total earnings (losses) as defined	$	365.8	$	199.7	$	(429.5	)	$	359.0	$	309.4

Fixed charges:
Interest expense (a)	$	151.8	$	180.2	$	231.1		$	219.3	$	199.9
Rent expense (b)	9.5		9.3		9.4			8.1		8.3
Capitalized interest	—		—		—			—		0.3
Total fixed charges	$	161.3	$	189.5	$	240.5		$	227.4	$	208.5

Ratio of earnings to fixed charges	2.3		1.1		—		(c)	1.6		1.5

(a) Interest expense includes amortization of debt expenses.

(b) Rent expense included in the computation consist of one-third of rental expense, which we believe to be a conservative estimate of an interest factor of our leases, which are not material.

(c) Earnings were insufficient to cover fixed charges by $670.0 million for the year ended December 31, 2008. Earnings for the year ended December 31, 2008 included a non-cash pre-tax goodwill impairment charge of $717.5 million.

ROCKWOOD SPECIALTIES GROUP INC 10-K