{"product_id":"isinglass","title":"Isinglass","description":"High quality isinglass from sturgeon farm-raised  in Germany. Isinglass is a high strength adhesive with a low viscosity and low gloss. Our isinglass is cleaned, prepared and dried according to conservation needs.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eUse in conservation:\u003c\/strong\u003e consolidation of flaking media, vellum repair, remoistenable tissue\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003cbr\u003eSturgeon, species \u003cem\u003eAcipenser baeri\u003c\/em\u003e: A large fish of the family \u003cem\u003eAcipenseridæ\u003c\/em\u003e, having an elongated, almost cylindrical, body protected by longitudinal rows of bony scutes and a long tapering snout, found widely distributed in the rivers and coastal waters of the north temperate zone; especially a fish belonging to either of the genera \u003cem\u003eAcipenser\u003c\/em\u003e and \u003cem\u003eScaphirhynchops\u003c\/em\u003e, \u003cem\u003eA. sturio\u003c\/em\u003e being the common sturgeon of the Atlantic. It is a ‘royal’ fish esteemed as an article of food, and the source of caviar and isinglass.¹\u003cbr\u003e\u003cbr\u003eIsinglass is retrieved from the inner membrane of the air\/swim bladder in the sturgeon fish. Originally, most sturgeon was caught from rivers discharging into Caspian and the Black Sea and with the high value market of the fish many sub species with inferior quality are being caught in other countries like India and Brazil.\u003cbr\u003e\u003cbr\u003ePolistini imports isinglass from sturgeon farm-raised in Germany. A conservator collaborates with a farm having the bladder prepared and dried to specifications important for conservation needs. The outer muscle lining is removed making sure the bladder is cleaned of blood. The breeding of the fish has to comply with very strict regulations and environmental specifications under the German law.\u003cbr\u003e\u003cbr\u003eTo guarantee highest purity and maximum adhesive strength meticulous preparation is key. The preparation does not include any preservatives or other additions; the bladder is prepared and simply dried.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eRecipe for adhesive preparation:\u003c\/strong\u003e\u003cul\u003e \t\u003cli\u003eCut or tear dried bladder into small pieces, if bladder is too hard soak for an hour or two and then cut.\u003c\/li\u003e \t\u003cli\u003eSoak pieces in distilled water for 12-16 hours.\u003c\/li\u003e \t\u003cli\u003eRatio is 1 part and 9 parts. For example 5g dried bladder and 45g water.\u003c\/li\u003e \t\u003cli\u003eWarm solution in a water bath between 45°C and 60°C (154F), note temperature of water not temperature of solution. It is important to neither go above or below those temperatures to guarantee best strength.\u003c\/li\u003e \t\u003cli\u003eFilter the warm solution through an inert cloth, such as cheesecloth.\u003c\/li\u003e \t\u003cli\u003ePour a thin layer of solution onto a sheet of polyester or similar inert material.\u003c\/li\u003e \t\u003cli\u003eDry solution for 24 hours (or even 48) in a shaded and well ventilated area.\u003c\/li\u003e \t\u003cli\u003eStore dried sheets preferably in a glass container. The first 3 days do not seal glass container, since there can be some residual moisture remaining.\u003c\/li\u003e\n\u003c\/ul\u003eAdhesive concentrations start at 1% in water, the concentration of the farm raised sturgeon bladder is lower than sturgeon from other origins. The addition of ethanol or honey to the solution is not recommended since it will alter the protein structure and therefore decrease in adhesive strength.\u003cbr\u003e\u003cbr\u003e\u003csup\u003e1\u003c\/sup\u003eFrom: \u003ca href=\"http:\/\/dictionary.oed.com\" target=\"_blank\" rel=\"noopener\"\u003ehttp:\/\/dictionary.oed.com\u003c\/a\u003e\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eReference publications:\u003c\/strong\u003e\u003cbr\u003eMaria Przybylo, “Langzeit-Löslichkeit von Störleim. Tatsache oder Märchen?” Verband Deutscher Restauratoren Beiträge, Heft 1, 2006\u003cbr\u003e\u003cbr\u003eQuandt, Abigail B. (1996) \"Recent Developments in the Conservation of Parchment Manuscripts.\" The American Institute for Conservation, The Book and Paper Group Annual\u003cbr\u003e\u003cbr\u003ePataki, Andrea (2009)”Remoistenable Tissue Preparation and its Practical Aspects.” Restaurator Volume 30 No. 1 and 2\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e ","brand":"polistinidev","offers":[{"title":"5 grams","offer_id":52111487992111,"sku":"A-00013","price":12.9,"currency_code":"USD","in_stock":true},{"title":"25 grams","offer_id":52111488024879,"sku":"A-00014","price":64.45,"currency_code":"USD","in_stock":false},{"title":"50 grams","offer_id":52111488057647,"sku":"A-00015","price":116.05,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/9932\/3183\/files\/isinglass.jpg?v=1765547390","url":"https:\/\/polistini.com\/products\/isinglass","provider":"Polistini","version":"1.0","type":"link"}