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A carefully controlled hydrolysis of the finest isinglass is carried out using citric acid under procedures laid down under BS5750.
When the laboratory are satisfied the correct stage of hydrolysis is attained the paste is transferred, using refrigerated transport, to the freeze-drying plant.
Here the material is placed into storage at -60C
until drying is undertaken.
When the drying occurs the material is spread thinly on trays and fed into a vacuum chamber, still at -60C, where the residual moisture and organic acid are flashed off. The dry material, looking a little like foam
polystyrene is returned where it is milled, under refrigeration, to a suitable fine particle size.
After laboratory evaluation, additions of malic acid and potassium metabisulphite are made to the powder so that when reconstituted in solution, the correct pH and preservative levels are generated. It is at this
stage that the Silica Hydrogel is added so that during mixing a totally homogeneous mix is achieved.
The benefits of this freeze-dried material relative to liquid finings are in two areas.
Because the material is prehydrolised under controlled conditions in the factory, the solution made is consistent with our high standards and contains only hydrolysed collagen - liquid solutions stored above 20C
denature rapidly.
Beer Brite and Vin Clear will keep for long periods without any loss of performance.
The unique combination of isinglass and Silica Hydrogel give the unbeatable ability to fine wines and beers, even those containing higher than ideal levels of proteins, which no single fining reagent can offer.
Because of this unique combination it fines faster and with a more compact sediment and thus less waste than conventional finings.
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