Equipment: This QLA UAP 6 is a rotating, non expandable cylinder for skin testing that is compatible with all brands of dissolution baths and fully complies with USP specifications; The transdermal or skin allergy test is conducted using Method 5 (slurry tray) or Method 6 (rotating cylinder). Method: Rotating a cylinder is very similar to USP method 1 (rotating basket). However, using USP method 6, the basket assembly was replaced by a sturdy stainless steel cylinder. This cylinder consists of two parts: spindle/cylinder assembly and an extension. This extension is only used when the skin patch requires a large area. Unlike dissolution tests, skin tests are conducted at 32 ° C to reflect the lower temperature of the skin. Other variables, such as height setting, sampling requirements, and dissolution test, are the same.