Abstract: The invention relates to a process for producing a three-dimensional stiffening element from a powder selected from the group consisting of a meltable plastic powder and a powder mixture comprising the meltable plastic powder comprising applying the powder to an auxiliary carrier in a template screen printing process with the aid of a template and subsequently transferring the thus obtained stiffening element to a substrate, the improvement comprising subsequent to the step of applying to the auxiliary carrier, compressing and sintering the powder with a hot molding plug to obtain a blank; lifting the plug while removing the blank from the auxiliary carrier and further melting the sintered plastic particles of the blank which are in contact with the molding plug; and said step of transferring comprising transferring the further melted blank onto the substrate disposed therebelow while lowering the molding plug.

Abstract: A process for producing molds, models and tools from hard gypsum and/or cement including applying at least one base layer composed of a binder to a model from which a mold is to be made and which has been provided with an unmolding agent, and pressing onto this base layer a glass fiber reinforced molding composition composed of 95 to 0 weight % .alpha.-calcium sulfate hemihydrate, 0 to 95 weight % cement, 0.5 to 8 weight % glass fibers and 0.5 to 4 weight % suspension agent, with reference to the dry weight, as well as water in a wet-on-wet process and unmolding the resulting laminate after it has set.

Abstract: A stiffening material composed of 30 to 80 weight percent filler particles and 70 to 20 weight percent binder which is thermoplastically deformable and has melt-adhesive properties in the temperature range of 50.degree. to 80.degree. C., wherein the filler particles are plastic particles or particles having plastic surfaces with a particle size distribution of 50 to 500 microns.

Abstract: Novel process for the production of magaldrate by the reaction of active aluminum hydroxide with a water soluble, sulfate containing compound and active magnesium oxide and/or magnesium hydroxide in stoichiometric quantities in the presence of water.

Abstract: Process for the production of precision castings with well-defined reproduction of detail and a great accuracy of measurement, by which the pattern to be reproduced is equipped with a drainage apparatus, having at least one duct extending outside the molding box, and the molding material containing phosphate as the bonding agent is poured in the molding box and solidified. After the pattern is removed from the solidified mold, by the introduction of compressed gas, the water of the solidified material is pressed out, and after calcining at a temperature of at least 250.degree. C., the mold is connected to a vacuum line and evacuated. The molten metal mass is then poured into the mold while the vacuum is maintained and solidified.

Abstract: A composition of matter for the neutral sizing of paper, paperboard, cardboard and other cellulose containing materials, is disclosed comprising water; a solvent which is unlimitedly miscible with water, particularly alcohol; a compound which undergoes a basic reaction; alkali aluminate; and a sizing component. When sizing is effected with this agent, the fiber containing suspension is mixed with a retention agent, before or after the addition of the sizing agent, with the sizing agent being activated by way of neutralization.

Abstract: Process for the production of casting parts with well-defined reproduction of detail and a great accuracy of measurement using the gypsum-form process. The pattern to be copied is equipped with a drainage apparatus, having at least one channel extending outside the molding box, and the molding material is poured into the mold and solidified. After the pattern is removed from the solidified mold by the introduction of compressed gas, the water of the solidified material is removed from, and after drying the mold is connected to a vacuum line and evacuated. The molten mass is then poured into the mold while the vacuum is maintained and solidified.

Abstract: Crystalline, basic magnesium aluminum hydroxycarbonate of the formulaAl.sub.2 Mg.sub.6 (OH).sub.12 (CO.sub.3).sub.3.xH.sub.2 Owhere x is at least 4. A process for producing it comprises the conversion of aluminum hydroxide with basic magnesium carbonate and at least one compound selected from magnesium hydroxide and magnesium oxide. Stoichiometric quantities are employed with reference to the aluminum and the magnesium. The conversion takes place at temperatures from 50.degree. to 100.degree. C., and the resulting product is subsequently spray dried.