Auxiliary finings are added to cask beer at the end of fermentation, prior to isinglass addition to enhance the clarification effects of isinglass.
Auxiliary finings contain protein-reactive materials such as silicic acid and/or polysaccharide. Auxiliary finings associate with haze-forming beer proteins. The isinglass complexes with these associations as well as the other proteins and yeast in the beer to enhance sedimentation and clarification.
Exhibits optimum speed of clarification
A typical treatment rate of 0.25 – 1 pints per barrel is recommended.
For both performance and commercial considerations it is advisable to identify the correct addition rate. This will vary from beer to beer.