Sensient Technologies Corporation reported that diluted earnings per share for its first quarter ended March 31, 2007, increased 8.8 percent, to 37 cents from 34 cents last year. First quarter 2007 revenue increased 8.5 percent to $285.3 million as a result of strong sales in each of the company’s operating segments.      “Our cosmetic and food and beverage product lines performed very well, resulting in record first quarter sales,” said Kenneth P. Manning, chairman, president and CEO of Sens...