Sustained release dosage forms for twice daily oral dosing to a human patient for providing relief from pain are provided. The process utilizes a test element array including several test elements is co-reproduced with an image to be reproduced, whereby for the pixels of the image and the test elements of the test element array, color co-ordinate data are present in an original color space and for the test elements of the test element array the color values are present in an assessment color space are present. The replaceable blade is able to be replaced. 1 ccg or more, and said platinum particles are selectively adsorbed at the electrode accepting points on said compound oxide.