Our liquid gelatin eliminates the need for heated coating equipment and its critical temperature and viscosity control. HiPurets greatest advantage for photographic coatings is the fact that water solutions remain flowable liquids at room temperature which eliminates many of the handling problems associated with gelatin. It should be noted that HiPure has no cysteine and very little methionine in its composition, so it is very low in sulfur.
This gives a very pure gelatin with low ash. It is deionized in the manufacturing process to remove all salts and the low molecular weight organic impurities. HiPure Liquid Gelatin is very suitable for use in photographic applications. If water is to be added to the formula, dilution of the emulsion or latex before adding to the gelatin is suggested. When mixing emulsions with gelatin, special care must be taken to avoid undue localized concentrations which might tend to coagulate the emulsion. The following materials have shown compatibility with HiPure Gelatin:įilms cast from mixtures are generally clear. Here are the toleration levels of various solvents in 100 parts of 45% Liquid Gelatin solution: Use 5 - 10% based on dry weight.Īlthough dried films are insoluble in organic solvents, the liquid gelatin will tolerate certain water miscible solvents. If a flexible film is desired, it can be plasticized with a humectant such as glycerin or a glycol. Formaldehyde, gluteraldehyde, and glyoxal will likewise react with gelatin to insolubilize it.ĭry films ofHiPure are hard and somewhat brittle. Acid chromates will also insolubilize the gelatin as the cremate will oxidize it and be reduced to trivalent chromium. Large amounts of acids and bases should be avoided, as the gelatin will degrade in time at pH below 3.0 or above 9.0.Īlthough HiPure Liquid Gelatin is very water soluble, it can be made insoluble by the addition of polyvalent ion salts such as aluminum sulfate, ferric sulfate, or chrome alum. Reactivity will depend on the pH of the gelatin solution with amino end groups reacting on the alkaline side, and carboxy end groups reacting on the acid side. It is amphoteric in nature and offers a variety of reactive end groups, including hydroxy (OH), carboxy (COOH), and amino end groups (NH2). Norland HiPure Liquid Gelatin is a protein molecule consisting of a complex chain of 20 amino acids. The combination will have excellent film forming properties. This can be reduced to as low as 150C with appropriate amounts ofHiPure Liquid Gelatin. Water solutions of animal gelatin will normally gel at 30-350C.
HiPure Liquid Gelatin can be combined with animal gelatin to lower the gel or melting point of the latter, and to make the animal gelatin more water soluble. It is also an excellent material for use in formulating leather finishes, or it can be used as a substantive protein in personal care products. Compatible with a wide variety of water soluble monomers.Īs an alternative to regular gelatin, HiPure Liquid Gelatin can be used for silver emulsions, for subbing films, as a wash off coating in graphic arts, and for dichromated coatings used in photoresists.Coatings will accept water soluble dyes.Coatings can be made water resistant and insoluble in water.Excellent adhesion to metal, rubber, glass, leather, cork, wood and paper.Acts as a protective colloid to suspend small particles or monomers in solution.
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