Vin Clear finings are a very powerful form of dry insinglass finings. Isinglass is one of the main fining agents for clearing beer in the world and is used by virtually all breweries. The main problem with isinglass is that it needs to be kept constantly cool otherwise the product denatures and will not work. To overcome this, we have freeze-dried the isinglass at the point of making it up. Being a freeze-dried product, it can be stored at virtually any temperature without it losing any of its characteristics. Also, the free-drying extends the life of the finings considerably.
All that is needed to prepare the Vin Clear is to mix it in half cup of cold water or wine, mixing with a fork for at least 1 minute, then leave this for 15 minutes to absorb the water. Then, give another mix for at least 1 minute and the finings are ready to use. This has the benefit of producing the finings with 100% activity, so you are using a more powerful and stronger finings. This results in clear wine quickly with a more compact sediment.
When liquid isinglass is manufactured, it starts to deteriorate. The longer it is kept, the less fining properties are left in the product. As the Vin Clear was freeze-dried when it was made up, and then you are adding the water later on, you are using the full 100% fining properties.
Vin Clear is available in single-dose sachets to treat 22.5 litres (5 gallons) or 2 x 4.5 litres (2 x 1 gallons) of wine.
HOW DO YOU FREEZE-DRY FININGS?
A carefully controlled hydrolysis of the finest isinglass is carried out using citric acid under procedures laid down under BS5750.
When the laboratory is 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.
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