Abstract: A method of preparing glass for etching includes providing a section of the glass and printing a mask directly on to the section of the glass by depositing ink with a printer. A printing system for preparing a section of the glass for etching includes a printer configured to print a mask directly on to the section of the glass by depositing ink on to the section of the glass. A glass etching system includes a printing system for preparing a section of the glass for etching and an etching bath for receiving the section of the glass and for exposing at least a portion of the section of the glass to an etching solution in order to remove colouring from the section of the glass in areas not covered by the mask.

Abstract: The present invention relates to a method for preparing a composition comprising one or more omega-3 fatty acid salt(s), the composition obtainable or obtained by this method, and also the use of this composition for the preparation of foodstuffs, food supplements or pharmaceutical products.

Abstract: The invention relates to a process for increasing the selectivity of the hydrogenation of 4,4?-diaminodiphenylmethane (4,4?-MDA) to diaminodicyclohexylmethane (4,4?-HMDA) by catalytic hydrogenation of a mixture containing 4,4?-MDA as the main component and its mono-N-methyl derivative as a secondary component. According to the invention, the hydrogenation is terminated before a conversion of 4,4?-MDA to 4,4?-HMDA of 99% is achieved. Under these conditions, a substantially smaller proportion of the N-methyl-4,4?-MDA is hydrogenated to N-methyl-4,4-HMDA.