This machine is used to extract water soluble materials from leather by the method of analysis specified in many national and international standards.
The leather must first be ground using a suitable grinding mill (available from SATRA) and then shaken with water in a vacuum flask to extract the soluble matter (using the shaking machine STM 145). The use of vacuum flasks keeps the liquid at the specified temperature during the extraction process. The machine accommodates eight flasks (supplied with the machine) and rotates them at 50rpm in an over-tumbling action.
The same machine can be used to determine the pH (acidity) levels in leather for which additional equipment is required. Leather pH levels require the use of a small plastic flask and an adaptor to enable the flask to be used in conjunction with STM 145 (available on request).