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Aug 25, 2015

Fabrics for Rinsing


"Do you offer tissues/fabrics to determine the effectiveness of rinsing in a washer?"

Oops - this touches a critical issue. The main question really is what tracer to monitor for assessing rinsing. In the world of domestic washers we can look back on 35 years of history of developing / refining rinsing test methods - without success. I gave an overview in a paper I presented at the IDC conference in 2011 - you can download a pdf version of the slides from our publcations section.

Since then a joint effort of AHAM (USA) and Cenelec (EU) achieved a promising draft protocol that will very likely make it into the next edition of the washer test method IEC 60456. This method uses the photometric detection of LAS (anionic surfactant) that is introduced into the test system in a well defined way by the test detergent. The fabric used here is the IEC standard cotton, our product 'wfk 90A', order code 16000. However, this method is not designed to work for 'real' systems that use real (i.e. non-standard) detergents.

Regarding rinsing in industrial and institutional laundering: That has been the subject of previous and ongoing research projects. Our colleagues at wfk Cleaning Technology Institutemy be able to help with some information. The inorganic incrustation tested on our Laundry Control Cloths is - of course - partly depending on rinsing efficiency and may be used as a hint or if all other factors leading to ash build-up are constant. Fabric in that case is the wfk Standard Cotton 'wfk 11A', order code 11000. Pre-washed and ready-to-used test cloths can be obtained as our product 'wfk 10W', order code 11700.