CREATION OF A TRANSPARENT WINDOW IN A SECURITY SUBSTRATE FOR SECURITY PRINTING APPLICATIONS.

摘要

There is described a method of creating a transparent window (W*) in a security, especially paper, substrate (1) for security printing applications, the method comprising the steps of (i) providing a security substrate (1), (ii) forming an opening (10*) into and through the security substrate (1), and (iii) filling the opening (10*) with transparent material (2) thereby forming the transparent window (W*). The filling of the opening (10*) with the transparent material (2) is carried out in a state where the opening (10*) is open on both sides of the security substrate (1) and extends through the security substrate (1), the filling of the opening (10*) including the application of a first side (I) of the security substrate (1) against a supporting surface (21A) of a supporting member (20', 21) in such a way as to block one side of the opening (10*), while the transparent material (2) is applied inside the opening (10*) from the other side (II) of the security substrate (1). Advantageously, the method further comprises the step of forming a field of lenses (L) on one side of the transparent window (W*), in particular by replicating the field of lenses (L) directly into the transparent material (2) filling the opening (10*). Also described is a suitable device designed to fill the opening (10*) with the transparent material (2). A process is described for the production of hydrocarbon fractions which can be used as diesel fuel or as components of diesel fuel, starting from a mixture of a biological origin containing fatty acid esters with glycerine, and possibly containing aliquots of free fatty acids and/or phosphoglycerides, wherein said process comprises the following steps: - subjecting the mixture of a biological origin to hydrolysis, obtaining a mixture containing glycerine and a mixture of fatty acids, - neutralizing the mixture of fatty acids with ammonia, - subjecting the neutralized mixture to hydrodeoxygenation, - subjecting the mixture resulting from the hydrodeoxygenation to hydroisomerization. The process of the present invention allows the triglycerides. This aspect, in addition to allowing the recovery of glycerine, which can be used as precursor of fuel components, allows the hydrogen consumption to be avoided in the hydrodeoxygenation step, which occurs when glycerine is present and therefore undergoes reduction to propane. Furthermore, if the mixture of a biological origin also contains aliquots of free fatty acids, the process of the invention also avoids problems of corrosion due to said acids, during the hydrodeoxygenation treatment. There is described a method of creating a transparent window (W*) in a security, especially paper, substrate (1) for security printing applications, the method comprising the steps of (i) providing a security substrate (1), (ii) forming an opening (10*) into and through the security substrate (1), and (iii) filling the opening (10*) with transparent material (2) thereby forming the transparent window (W*). The filling of the opening (10*) with the transparent material (2) is carried out in a state where the opening (10*) is open on both sides of the security substrate (1) and extends through the security substrate (1), the filling of the opening (10*) including the application of a first side (I) of the security substrate (1) against a supporting surface (21A) of a supporting member (20', 21) in such a way as to block one side of the opening (10*), while the transparent material (2) is applied inside the opening (10*) from the other side (II) of the security substrate (1). Advantageously, the method further comprises the step of forming a field of lenses (L) on one side of the transparent window (W*), in particular by replicating the field of lenses (L) directly into the transparent material (2) filling the opening (10*). Also described is a suitable device designed to fill the opening (10*) with the transparent material (2).